removed codegen/time.h
diff --git a/BUILD b/BUILD
index 4823948..84ce5b2 100644
--- a/BUILD
+++ b/BUILD
@@ -143,7 +143,6 @@
     "include/grpc/impl/codegen/sync_generic.h",
     "include/grpc/impl/codegen/sync_posix.h",
     "include/grpc/impl/codegen/sync_windows.h",
-    "include/grpc/impl/codegen/time.h",
   ],
   includes = [
     "include",
@@ -520,7 +519,6 @@
     "include/grpc/impl/codegen/sync_generic.h",
     "include/grpc/impl/codegen/sync_posix.h",
     "include/grpc/impl/codegen/sync_windows.h",
-    "include/grpc/impl/codegen/time.h",
     "include/grpc/grpc_security.h",
     "include/grpc/grpc_security_constants.h",
     "include/grpc/census.h",
@@ -877,7 +875,6 @@
     "include/grpc/impl/codegen/sync_generic.h",
     "include/grpc/impl/codegen/sync_posix.h",
     "include/grpc/impl/codegen/sync_windows.h",
-    "include/grpc/impl/codegen/time.h",
     "include/grpc/grpc_cronet.h",
     "include/grpc/grpc_security.h",
     "include/grpc/grpc_security_constants.h",
@@ -1206,7 +1203,6 @@
     "include/grpc/impl/codegen/sync_generic.h",
     "include/grpc/impl/codegen/sync_posix.h",
     "include/grpc/impl/codegen/sync_windows.h",
-    "include/grpc/impl/codegen/time.h",
     "include/grpc/census.h",
   ],
   includes = [
@@ -1364,7 +1360,6 @@
     "include/grpc/impl/codegen/sync_generic.h",
     "include/grpc/impl/codegen/sync_posix.h",
     "include/grpc/impl/codegen/sync_windows.h",
-    "include/grpc/impl/codegen/time.h",
   ],
   includes = [
     "include",
@@ -1441,7 +1436,6 @@
     "include/grpc/impl/codegen/sync_generic.h",
     "include/grpc/impl/codegen/sync_posix.h",
     "include/grpc/impl/codegen/sync_windows.h",
-    "include/grpc/impl/codegen/time.h",
     "include/grpc++/impl/codegen/config_protobuf.h",
   ],
   includes = [
@@ -1586,7 +1580,6 @@
     "include/grpc/impl/codegen/sync_generic.h",
     "include/grpc/impl/codegen/sync_posix.h",
     "include/grpc/impl/codegen/sync_windows.h",
-    "include/grpc/impl/codegen/time.h",
   ],
   includes = [
     "include",
@@ -1751,7 +1744,6 @@
     "include/grpc/impl/codegen/sync_generic.h",
     "include/grpc/impl/codegen/sync_posix.h",
     "include/grpc/impl/codegen/sync_windows.h",
-    "include/grpc/impl/codegen/time.h",
     "src/core/lib/profiling/timers.h",
     "src/core/lib/support/backoff.h",
     "src/core/lib/support/block_annotate.h",
@@ -1987,7 +1979,6 @@
     "include/grpc/impl/codegen/sync_generic.h",
     "include/grpc/impl/codegen/sync_posix.h",
     "include/grpc/impl/codegen/sync_windows.h",
-    "include/grpc/impl/codegen/time.h",
     "include/grpc/grpc_security.h",
     "include/grpc/grpc_security_constants.h",
     "include/grpc/census.h",
diff --git a/Makefile b/Makefile
index 402294b..ddbe15d 100644
--- a/Makefile
+++ b/Makefile
@@ -2450,7 +2450,6 @@
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
     include/grpc/impl/codegen/sync_windows.h \
-    include/grpc/impl/codegen/time.h \
 
 LIBGPR_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGPR_SRC))))
 
@@ -2728,7 +2727,6 @@
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
     include/grpc/impl/codegen/sync_windows.h \
-    include/grpc/impl/codegen/time.h \
     include/grpc/grpc_security.h \
     include/grpc/grpc_security_constants.h \
     include/grpc/census.h \
@@ -2976,7 +2974,6 @@
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
     include/grpc/impl/codegen/sync_windows.h \
-    include/grpc/impl/codegen/time.h \
     include/grpc/grpc_cronet.h \
     include/grpc/grpc_security.h \
     include/grpc/grpc_security_constants.h \
@@ -3309,7 +3306,6 @@
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
     include/grpc/impl/codegen/sync_windows.h \
-    include/grpc/impl/codegen/time.h \
     include/grpc/census.h \
 
 LIBGRPC_UNSECURE_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGRPC_UNSECURE_SRC))))
@@ -3558,7 +3554,6 @@
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
     include/grpc/impl/codegen/sync_windows.h \
-    include/grpc/impl/codegen/time.h \
 
 LIBGRPC++_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGRPC++_SRC))))
 
@@ -3682,7 +3677,6 @@
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
     include/grpc/impl/codegen/sync_windows.h \
-    include/grpc/impl/codegen/time.h \
     include/grpc++/impl/codegen/config_protobuf.h \
 
 LIBGRPC++_REFLECTION_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGRPC++_REFLECTION_SRC))))
@@ -3907,7 +3901,6 @@
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
     include/grpc/impl/codegen/sync_windows.h \
-    include/grpc/impl/codegen/time.h \
     include/grpc++/impl/codegen/proto_utils.h \
     include/grpc++/impl/codegen/config_protobuf.h \
 
@@ -4088,7 +4081,6 @@
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
     include/grpc/impl/codegen/sync_windows.h \
-    include/grpc/impl/codegen/time.h \
 
 LIBGRPC++_UNSECURE_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGRPC++_UNSECURE_SRC))))
 
diff --git a/build.yaml b/build.yaml
index 3113836..eb3a39a 100644
--- a/build.yaml
+++ b/build.yaml
@@ -139,7 +139,6 @@
   - include/grpc/impl/codegen/sync_generic.h
   - include/grpc/impl/codegen/sync_posix.h
   - include/grpc/impl/codegen/sync_windows.h
-  - include/grpc/impl/codegen/time.h
 - name: grpc_base
   public_headers:
   - include/grpc/byte_buffer.h
diff --git a/gRPC-Core.podspec b/gRPC-Core.podspec
index dbc5786..34c385c 100644
--- a/gRPC-Core.podspec
+++ b/gRPC-Core.podspec
@@ -156,7 +156,6 @@
                       'include/grpc/impl/codegen/sync_generic.h',
                       'include/grpc/impl/codegen/sync_posix.h',
                       'include/grpc/impl/codegen/sync_windows.h',
-                      'include/grpc/impl/codegen/time.h',
                       'include/grpc/byte_buffer.h',
                       'include/grpc/byte_buffer_reader.h',
                       'include/grpc/compression.h',
@@ -181,7 +180,6 @@
                       'include/grpc/impl/codegen/sync_generic.h',
                       'include/grpc/impl/codegen/sync_posix.h',
                       'include/grpc/impl/codegen/sync_windows.h',
-                      'include/grpc/impl/codegen/time.h',
                       'include/grpc/grpc_security.h',
                       'include/grpc/grpc_security_constants.h',
                       'include/grpc/census.h'
diff --git a/grpc.def b/grpc.def
index 456198d..f264bf7 100644
--- a/grpc.def
+++ b/grpc.def
@@ -190,27 +190,6 @@
     gpr_stats_init
     gpr_stats_inc
     gpr_stats_read
-    gpr_time_0
-    gpr_inf_future
-    gpr_inf_past
-    gpr_time_init
-    gpr_now
-    gpr_convert_clock_type
-    gpr_time_cmp
-    gpr_time_max
-    gpr_time_min
-    gpr_time_add
-    gpr_time_sub
-    gpr_time_from_micros
-    gpr_time_from_nanos
-    gpr_time_from_millis
-    gpr_time_from_seconds
-    gpr_time_from_minutes
-    gpr_time_from_hours
-    gpr_time_to_millis
-    gpr_time_similar
-    gpr_sleep_until
-    gpr_timespec_to_micros
     gpr_malloc
     gpr_free
     gpr_realloc
@@ -270,3 +249,24 @@
     gpr_thd_options_is_joinable
     gpr_thd_currentid
     gpr_thd_join
+    gpr_time_0
+    gpr_inf_future
+    gpr_inf_past
+    gpr_time_init
+    gpr_now
+    gpr_convert_clock_type
+    gpr_time_cmp
+    gpr_time_max
+    gpr_time_min
+    gpr_time_add
+    gpr_time_sub
+    gpr_time_from_micros
+    gpr_time_from_nanos
+    gpr_time_from_millis
+    gpr_time_from_seconds
+    gpr_time_from_minutes
+    gpr_time_from_hours
+    gpr_time_to_millis
+    gpr_time_similar
+    gpr_sleep_until
+    gpr_timespec_to_micros
diff --git a/grpc.gemspec b/grpc.gemspec
index 099cbe1..bb2070b 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -83,7 +83,6 @@
   s.files += %w( include/grpc/impl/codegen/sync_generic.h )
   s.files += %w( include/grpc/impl/codegen/sync_posix.h )
   s.files += %w( include/grpc/impl/codegen/sync_windows.h )
-  s.files += %w( include/grpc/impl/codegen/time.h )
   s.files += %w( src/core/lib/profiling/timers.h )
   s.files += %w( src/core/lib/support/backoff.h )
   s.files += %w( src/core/lib/support/block_annotate.h )
@@ -164,7 +163,6 @@
   s.files += %w( include/grpc/impl/codegen/sync_generic.h )
   s.files += %w( include/grpc/impl/codegen/sync_posix.h )
   s.files += %w( include/grpc/impl/codegen/sync_windows.h )
-  s.files += %w( include/grpc/impl/codegen/time.h )
   s.files += %w( include/grpc/grpc_security.h )
   s.files += %w( include/grpc/grpc_security_constants.h )
   s.files += %w( include/grpc/census.h )
diff --git a/include/grpc++/impl/codegen/client_context.h b/include/grpc++/impl/codegen/client_context.h
index 012bcc2..d6596d4 100644
--- a/include/grpc++/impl/codegen/client_context.h
+++ b/include/grpc++/impl/codegen/client_context.h
@@ -64,7 +64,6 @@
 #include <grpc/impl/codegen/compression_types.h>
 #include <grpc/impl/codegen/log.h>
 #include <grpc/impl/codegen/propagation_bits.h>
-#include <grpc/impl/codegen/time.h>
 
 struct census_context;
 struct grpc_call;
diff --git a/include/grpc++/impl/codegen/completion_queue.h b/include/grpc++/impl/codegen/completion_queue.h
index 03009e0..2c22c3b 100644
--- a/include/grpc++/impl/codegen/completion_queue.h
+++ b/include/grpc++/impl/codegen/completion_queue.h
@@ -52,7 +52,6 @@
 #include <grpc++/impl/codegen/grpc_library.h>
 #include <grpc++/impl/codegen/status.h>
 #include <grpc++/impl/codegen/time.h>
-#include <grpc/impl/codegen/time.h>
 
 struct grpc_completion_queue;
 
@@ -217,7 +216,7 @@
   /// Performs a single polling pluck on \a tag.
   /// \warning Must not be mixed with calls to \a Next.
   void TryPluck(CompletionQueueTag* tag) {
-    auto deadline = gpr_time_0(GPR_CLOCK_REALTIME);
+    auto deadline = g_core_codegen_interface->gpr_time_0(GPR_CLOCK_REALTIME);
     auto ev = g_core_codegen_interface->grpc_completion_queue_pluck(
         cq_, tag, deadline, nullptr);
     if (ev.type == GRPC_QUEUE_TIMEOUT) return;
diff --git a/include/grpc++/impl/codegen/core_codegen.h b/include/grpc++/impl/codegen/core_codegen.h
index 9699abf..9ad5902 100644
--- a/include/grpc++/impl/codegen/core_codegen.h
+++ b/include/grpc++/impl/codegen/core_codegen.h
@@ -75,6 +75,7 @@
   void grpc_metadata_array_destroy(grpc_metadata_array* array) GRPC_OVERRIDE;
 
   gpr_timespec gpr_inf_future(gpr_clock_type type) GRPC_OVERRIDE;
+  gpr_timespec gpr_time_0(gpr_clock_type type) GRPC_OVERRIDE;
 
   virtual const Status& ok() GRPC_OVERRIDE;
   virtual const Status& cancelled() GRPC_OVERRIDE;
diff --git a/include/grpc++/impl/codegen/core_codegen_interface.h b/include/grpc++/impl/codegen/core_codegen_interface.h
index 5ff885a..24891ec 100644
--- a/include/grpc++/impl/codegen/core_codegen_interface.h
+++ b/include/grpc++/impl/codegen/core_codegen_interface.h
@@ -95,6 +95,7 @@
   virtual const Status& cancelled() = 0;
 
   virtual gpr_timespec gpr_inf_future(gpr_clock_type type) = 0;
+  virtual gpr_timespec gpr_time_0(gpr_clock_type type) = 0;
 };
 
 extern CoreCodegenInterface* g_core_codegen_interface;
diff --git a/include/grpc++/impl/codegen/server_context.h b/include/grpc++/impl/codegen/server_context.h
index cea13a5..be8a69f 100644
--- a/include/grpc++/impl/codegen/server_context.h
+++ b/include/grpc++/impl/codegen/server_context.h
@@ -43,7 +43,6 @@
 #include <grpc++/impl/codegen/string_ref.h>
 #include <grpc++/impl/codegen/time.h>
 #include <grpc/impl/codegen/compression_types.h>
-#include <grpc/impl/codegen/time.h>
 
 struct gpr_timespec;
 struct grpc_metadata;
diff --git a/include/grpc++/impl/codegen/server_interface.h b/include/grpc++/impl/codegen/server_interface.h
index 3a3e052..1f1b714 100644
--- a/include/grpc++/impl/codegen/server_interface.h
+++ b/include/grpc++/impl/codegen/server_interface.h
@@ -52,6 +52,8 @@
 class Service;
 class ThreadPoolInterface;
 
+extern CoreCodegenInterface* g_core_codegen_interface;
+
 /// Models a gRPC server.
 ///
 /// Servers are configured and started via \a grpc::ServerBuilder.
@@ -78,7 +80,10 @@
   /// All completion queue associated with the server (for example, for async
   /// serving) must be shutdown *after* this method has returned:
   /// See \a ServerBuilder::AddCompletionQueue for details.
-  void Shutdown() { ShutdownInternal(gpr_inf_future(GPR_CLOCK_MONOTONIC)); }
+  void Shutdown() {
+    ShutdownInternal(
+        g_core_codegen_interface->gpr_inf_future(GPR_CLOCK_MONOTONIC));
+  }
 
   /// Block waiting for all work to complete.
   ///
diff --git a/include/grpc++/impl/codegen/time.h b/include/grpc++/impl/codegen/time.h
index d9b19bc..87c5112 100644
--- a/include/grpc++/impl/codegen/time.h
+++ b/include/grpc++/impl/codegen/time.h
@@ -35,7 +35,7 @@
 #define GRPCXX_IMPL_CODEGEN_TIME_H
 
 #include <grpc++/impl/codegen/config.h>
-#include <grpc/impl/codegen/time.h>
+#include <grpc/impl/codegen/grpc_types.h>
 
 namespace grpc {
 
@@ -79,7 +79,7 @@
 
 #include <chrono>
 
-#include <grpc/impl/codegen/time.h>
+#include <grpc/impl/codegen/grpc_types.h>
 
 namespace grpc {
 
diff --git a/include/grpc/impl/codegen/time.h b/include/grpc/impl/codegen/time.h
deleted file mode 100644
index c7c476c..0000000
--- a/include/grpc/impl/codegen/time.h
+++ /dev/null
@@ -1,108 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#ifndef GRPC_IMPL_CODEGEN_TIME_H
-#define GRPC_IMPL_CODEGEN_TIME_H
-/* Time support.
-   We use gpr_timespec, which is analogous to struct timespec.  On some
-   machines, absolute times may be in local time.  */
-
-#include <grpc/impl/codegen/grpc_types.h>
-#include <grpc/impl/codegen/port_platform.h>
-#include <stddef.h>
-#include <time.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* Time constants. */
-GPRAPI gpr_timespec
-gpr_time_0(gpr_clock_type type); /* The zero time interval. */
-GPRAPI gpr_timespec gpr_inf_future(gpr_clock_type type); /* The far future */
-GPRAPI gpr_timespec gpr_inf_past(gpr_clock_type type);   /* The far past. */
-
-#define GPR_MS_PER_SEC 1000
-#define GPR_US_PER_SEC 1000000
-#define GPR_NS_PER_SEC 1000000000
-#define GPR_NS_PER_MS 1000000
-#define GPR_NS_PER_US 1000
-#define GPR_US_PER_MS 1000
-
-/* initialize time subsystem */
-GPRAPI void gpr_time_init(void);
-
-/* Return the current time measured from the given clocks epoch. */
-GPRAPI gpr_timespec gpr_now(gpr_clock_type clock);
-
-/* Convert a timespec from one clock to another */
-GPRAPI gpr_timespec gpr_convert_clock_type(gpr_timespec t,
-                                           gpr_clock_type target_clock);
-
-/* Return -ve, 0, or +ve according to whether a < b, a == b, or a > b
-   respectively.  */
-GPRAPI int gpr_time_cmp(gpr_timespec a, gpr_timespec b);
-
-GPRAPI gpr_timespec gpr_time_max(gpr_timespec a, gpr_timespec b);
-GPRAPI gpr_timespec gpr_time_min(gpr_timespec a, gpr_timespec b);
-
-/* Add and subtract times.  Calculations saturate at infinities. */
-GPRAPI gpr_timespec gpr_time_add(gpr_timespec a, gpr_timespec b);
-GPRAPI gpr_timespec gpr_time_sub(gpr_timespec a, gpr_timespec b);
-
-/* Return a timespec representing a given number of time units. INT64_MIN is
-   interpreted as gpr_inf_past, and INT64_MAX as gpr_inf_future.  */
-GPRAPI gpr_timespec gpr_time_from_micros(int64_t x, gpr_clock_type clock_type);
-GPRAPI gpr_timespec gpr_time_from_nanos(int64_t x, gpr_clock_type clock_type);
-GPRAPI gpr_timespec gpr_time_from_millis(int64_t x, gpr_clock_type clock_type);
-GPRAPI gpr_timespec gpr_time_from_seconds(int64_t x, gpr_clock_type clock_type);
-GPRAPI gpr_timespec gpr_time_from_minutes(int64_t x, gpr_clock_type clock_type);
-GPRAPI gpr_timespec gpr_time_from_hours(int64_t x, gpr_clock_type clock_type);
-
-GPRAPI int32_t gpr_time_to_millis(gpr_timespec timespec);
-
-/* Return 1 if two times are equal or within threshold of each other,
-   0 otherwise */
-GPRAPI int gpr_time_similar(gpr_timespec a, gpr_timespec b,
-                            gpr_timespec threshold);
-
-/* Sleep until at least 'until' - an absolute timeout */
-GPRAPI void gpr_sleep_until(gpr_timespec until);
-
-GPRAPI double gpr_timespec_to_micros(gpr_timespec t);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* GRPC_IMPL_CODEGEN_TIME_H */
diff --git a/include/grpc/support/time.h b/include/grpc/support/time.h
index b3f2f8c..5b36dd8 100644
--- a/include/grpc/support/time.h
+++ b/include/grpc/support/time.h
@@ -34,6 +34,72 @@
 #ifndef GRPC_SUPPORT_TIME_H
 #define GRPC_SUPPORT_TIME_H
 
-#include <grpc/impl/codegen/time.h>
+#include <grpc/impl/codegen/grpc_types.h>
+#include <grpc/impl/codegen/port_platform.h>
+#include <stddef.h>
+#include <time.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Time constants. */
+GPRAPI gpr_timespec
+gpr_time_0(gpr_clock_type type); /* The zero time interval. */
+GPRAPI gpr_timespec gpr_inf_future(gpr_clock_type type); /* The far future */
+GPRAPI gpr_timespec gpr_inf_past(gpr_clock_type type);   /* The far past. */
+
+#define GPR_MS_PER_SEC 1000
+#define GPR_US_PER_SEC 1000000
+#define GPR_NS_PER_SEC 1000000000
+#define GPR_NS_PER_MS 1000000
+#define GPR_NS_PER_US 1000
+#define GPR_US_PER_MS 1000
+
+/* initialize time subsystem */
+GPRAPI void gpr_time_init(void);
+
+/* Return the current time measured from the given clocks epoch. */
+GPRAPI gpr_timespec gpr_now(gpr_clock_type clock);
+
+/* Convert a timespec from one clock to another */
+GPRAPI gpr_timespec gpr_convert_clock_type(gpr_timespec t,
+                                           gpr_clock_type target_clock);
+
+/* Return -ve, 0, or +ve according to whether a < b, a == b, or a > b
+   respectively.  */
+GPRAPI int gpr_time_cmp(gpr_timespec a, gpr_timespec b);
+
+GPRAPI gpr_timespec gpr_time_max(gpr_timespec a, gpr_timespec b);
+GPRAPI gpr_timespec gpr_time_min(gpr_timespec a, gpr_timespec b);
+
+/* Add and subtract times.  Calculations saturate at infinities. */
+GPRAPI gpr_timespec gpr_time_add(gpr_timespec a, gpr_timespec b);
+GPRAPI gpr_timespec gpr_time_sub(gpr_timespec a, gpr_timespec b);
+
+/* Return a timespec representing a given number of time units. INT64_MIN is
+   interpreted as gpr_inf_past, and INT64_MAX as gpr_inf_future.  */
+GPRAPI gpr_timespec gpr_time_from_micros(int64_t x, gpr_clock_type clock_type);
+GPRAPI gpr_timespec gpr_time_from_nanos(int64_t x, gpr_clock_type clock_type);
+GPRAPI gpr_timespec gpr_time_from_millis(int64_t x, gpr_clock_type clock_type);
+GPRAPI gpr_timespec gpr_time_from_seconds(int64_t x, gpr_clock_type clock_type);
+GPRAPI gpr_timespec gpr_time_from_minutes(int64_t x, gpr_clock_type clock_type);
+GPRAPI gpr_timespec gpr_time_from_hours(int64_t x, gpr_clock_type clock_type);
+
+GPRAPI int32_t gpr_time_to_millis(gpr_timespec timespec);
+
+/* Return 1 if two times are equal or within threshold of each other,
+   0 otherwise */
+GPRAPI int gpr_time_similar(gpr_timespec a, gpr_timespec b,
+                            gpr_timespec threshold);
+
+/* Sleep until at least 'until' - an absolute timeout */
+GPRAPI void gpr_sleep_until(gpr_timespec until);
+
+GPRAPI double gpr_timespec_to_micros(gpr_timespec t);
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif /* GRPC_SUPPORT_TIME_H */
diff --git a/package.xml b/package.xml
index 09b85d5..79f8e98 100644
--- a/package.xml
+++ b/package.xml
@@ -91,7 +91,6 @@
     <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_generic.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_posix.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_windows.h" role="src" />
-    <file baseinstalldir="/" name="include/grpc/impl/codegen/time.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/profiling/timers.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/support/backoff.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/support/block_annotate.h" role="src" />
@@ -172,7 +171,6 @@
     <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_generic.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_posix.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_windows.h" role="src" />
-    <file baseinstalldir="/" name="include/grpc/impl/codegen/time.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/grpc_security.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/grpc_security_constants.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/census.h" role="src" />
diff --git a/src/core/lib/channel/handshaker.h b/src/core/lib/channel/handshaker.h
index dfc469c..ec0b966 100644
--- a/src/core/lib/channel/handshaker.h
+++ b/src/core/lib/channel/handshaker.h
@@ -35,7 +35,6 @@
 #define GRPC_CORE_LIB_CHANNEL_HANDSHAKER_H
 
 #include <grpc/impl/codegen/grpc_types.h>
-#include <grpc/impl/codegen/time.h>
 
 #include "src/core/lib/iomgr/closure.h"
 #include "src/core/lib/iomgr/endpoint.h"
diff --git a/src/cpp/common/core_codegen.cc b/src/cpp/common/core_codegen.cc
index 14ba826..f51e316 100644
--- a/src/cpp/common/core_codegen.cc
+++ b/src/cpp/common/core_codegen.cc
@@ -131,6 +131,10 @@
   return ::gpr_inf_future(type);
 }
 
+gpr_timespec CoreCodegen::gpr_time_0(gpr_clock_type type) {
+  return ::gpr_time_0(type);
+}
+
 void CoreCodegen::assert_fail(const char* failed_assertion) {
   gpr_log(GPR_ERROR, "assertion failed: %s", failed_assertion);
   abort();
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.c b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
index 2583ea8..e9f84fa 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.c
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
@@ -228,27 +228,6 @@
 gpr_stats_init_type gpr_stats_init_import;
 gpr_stats_inc_type gpr_stats_inc_import;
 gpr_stats_read_type gpr_stats_read_import;
-gpr_time_0_type gpr_time_0_import;
-gpr_inf_future_type gpr_inf_future_import;
-gpr_inf_past_type gpr_inf_past_import;
-gpr_time_init_type gpr_time_init_import;
-gpr_now_type gpr_now_import;
-gpr_convert_clock_type_type gpr_convert_clock_type_import;
-gpr_time_cmp_type gpr_time_cmp_import;
-gpr_time_max_type gpr_time_max_import;
-gpr_time_min_type gpr_time_min_import;
-gpr_time_add_type gpr_time_add_import;
-gpr_time_sub_type gpr_time_sub_import;
-gpr_time_from_micros_type gpr_time_from_micros_import;
-gpr_time_from_nanos_type gpr_time_from_nanos_import;
-gpr_time_from_millis_type gpr_time_from_millis_import;
-gpr_time_from_seconds_type gpr_time_from_seconds_import;
-gpr_time_from_minutes_type gpr_time_from_minutes_import;
-gpr_time_from_hours_type gpr_time_from_hours_import;
-gpr_time_to_millis_type gpr_time_to_millis_import;
-gpr_time_similar_type gpr_time_similar_import;
-gpr_sleep_until_type gpr_sleep_until_import;
-gpr_timespec_to_micros_type gpr_timespec_to_micros_import;
 gpr_malloc_type gpr_malloc_import;
 gpr_free_type gpr_free_import;
 gpr_realloc_type gpr_realloc_import;
@@ -308,6 +287,27 @@
 gpr_thd_options_is_joinable_type gpr_thd_options_is_joinable_import;
 gpr_thd_currentid_type gpr_thd_currentid_import;
 gpr_thd_join_type gpr_thd_join_import;
+gpr_time_0_type gpr_time_0_import;
+gpr_inf_future_type gpr_inf_future_import;
+gpr_inf_past_type gpr_inf_past_import;
+gpr_time_init_type gpr_time_init_import;
+gpr_now_type gpr_now_import;
+gpr_convert_clock_type_type gpr_convert_clock_type_import;
+gpr_time_cmp_type gpr_time_cmp_import;
+gpr_time_max_type gpr_time_max_import;
+gpr_time_min_type gpr_time_min_import;
+gpr_time_add_type gpr_time_add_import;
+gpr_time_sub_type gpr_time_sub_import;
+gpr_time_from_micros_type gpr_time_from_micros_import;
+gpr_time_from_nanos_type gpr_time_from_nanos_import;
+gpr_time_from_millis_type gpr_time_from_millis_import;
+gpr_time_from_seconds_type gpr_time_from_seconds_import;
+gpr_time_from_minutes_type gpr_time_from_minutes_import;
+gpr_time_from_hours_type gpr_time_from_hours_import;
+gpr_time_to_millis_type gpr_time_to_millis_import;
+gpr_time_similar_type gpr_time_similar_import;
+gpr_sleep_until_type gpr_sleep_until_import;
+gpr_timespec_to_micros_type gpr_timespec_to_micros_import;
 
 void grpc_rb_load_imports(HMODULE library) {
   grpc_raw_byte_buffer_create_import = (grpc_raw_byte_buffer_create_type) GetProcAddress(library, "grpc_raw_byte_buffer_create");
@@ -501,27 +501,6 @@
   gpr_stats_init_import = (gpr_stats_init_type) GetProcAddress(library, "gpr_stats_init");
   gpr_stats_inc_import = (gpr_stats_inc_type) GetProcAddress(library, "gpr_stats_inc");
   gpr_stats_read_import = (gpr_stats_read_type) GetProcAddress(library, "gpr_stats_read");
-  gpr_time_0_import = (gpr_time_0_type) GetProcAddress(library, "gpr_time_0");
-  gpr_inf_future_import = (gpr_inf_future_type) GetProcAddress(library, "gpr_inf_future");
-  gpr_inf_past_import = (gpr_inf_past_type) GetProcAddress(library, "gpr_inf_past");
-  gpr_time_init_import = (gpr_time_init_type) GetProcAddress(library, "gpr_time_init");
-  gpr_now_import = (gpr_now_type) GetProcAddress(library, "gpr_now");
-  gpr_convert_clock_type_import = (gpr_convert_clock_type_type) GetProcAddress(library, "gpr_convert_clock_type");
-  gpr_time_cmp_import = (gpr_time_cmp_type) GetProcAddress(library, "gpr_time_cmp");
-  gpr_time_max_import = (gpr_time_max_type) GetProcAddress(library, "gpr_time_max");
-  gpr_time_min_import = (gpr_time_min_type) GetProcAddress(library, "gpr_time_min");
-  gpr_time_add_import = (gpr_time_add_type) GetProcAddress(library, "gpr_time_add");
-  gpr_time_sub_import = (gpr_time_sub_type) GetProcAddress(library, "gpr_time_sub");
-  gpr_time_from_micros_import = (gpr_time_from_micros_type) GetProcAddress(library, "gpr_time_from_micros");
-  gpr_time_from_nanos_import = (gpr_time_from_nanos_type) GetProcAddress(library, "gpr_time_from_nanos");
-  gpr_time_from_millis_import = (gpr_time_from_millis_type) GetProcAddress(library, "gpr_time_from_millis");
-  gpr_time_from_seconds_import = (gpr_time_from_seconds_type) GetProcAddress(library, "gpr_time_from_seconds");
-  gpr_time_from_minutes_import = (gpr_time_from_minutes_type) GetProcAddress(library, "gpr_time_from_minutes");
-  gpr_time_from_hours_import = (gpr_time_from_hours_type) GetProcAddress(library, "gpr_time_from_hours");
-  gpr_time_to_millis_import = (gpr_time_to_millis_type) GetProcAddress(library, "gpr_time_to_millis");
-  gpr_time_similar_import = (gpr_time_similar_type) GetProcAddress(library, "gpr_time_similar");
-  gpr_sleep_until_import = (gpr_sleep_until_type) GetProcAddress(library, "gpr_sleep_until");
-  gpr_timespec_to_micros_import = (gpr_timespec_to_micros_type) GetProcAddress(library, "gpr_timespec_to_micros");
   gpr_malloc_import = (gpr_malloc_type) GetProcAddress(library, "gpr_malloc");
   gpr_free_import = (gpr_free_type) GetProcAddress(library, "gpr_free");
   gpr_realloc_import = (gpr_realloc_type) GetProcAddress(library, "gpr_realloc");
@@ -581,6 +560,27 @@
   gpr_thd_options_is_joinable_import = (gpr_thd_options_is_joinable_type) GetProcAddress(library, "gpr_thd_options_is_joinable");
   gpr_thd_currentid_import = (gpr_thd_currentid_type) GetProcAddress(library, "gpr_thd_currentid");
   gpr_thd_join_import = (gpr_thd_join_type) GetProcAddress(library, "gpr_thd_join");
+  gpr_time_0_import = (gpr_time_0_type) GetProcAddress(library, "gpr_time_0");
+  gpr_inf_future_import = (gpr_inf_future_type) GetProcAddress(library, "gpr_inf_future");
+  gpr_inf_past_import = (gpr_inf_past_type) GetProcAddress(library, "gpr_inf_past");
+  gpr_time_init_import = (gpr_time_init_type) GetProcAddress(library, "gpr_time_init");
+  gpr_now_import = (gpr_now_type) GetProcAddress(library, "gpr_now");
+  gpr_convert_clock_type_import = (gpr_convert_clock_type_type) GetProcAddress(library, "gpr_convert_clock_type");
+  gpr_time_cmp_import = (gpr_time_cmp_type) GetProcAddress(library, "gpr_time_cmp");
+  gpr_time_max_import = (gpr_time_max_type) GetProcAddress(library, "gpr_time_max");
+  gpr_time_min_import = (gpr_time_min_type) GetProcAddress(library, "gpr_time_min");
+  gpr_time_add_import = (gpr_time_add_type) GetProcAddress(library, "gpr_time_add");
+  gpr_time_sub_import = (gpr_time_sub_type) GetProcAddress(library, "gpr_time_sub");
+  gpr_time_from_micros_import = (gpr_time_from_micros_type) GetProcAddress(library, "gpr_time_from_micros");
+  gpr_time_from_nanos_import = (gpr_time_from_nanos_type) GetProcAddress(library, "gpr_time_from_nanos");
+  gpr_time_from_millis_import = (gpr_time_from_millis_type) GetProcAddress(library, "gpr_time_from_millis");
+  gpr_time_from_seconds_import = (gpr_time_from_seconds_type) GetProcAddress(library, "gpr_time_from_seconds");
+  gpr_time_from_minutes_import = (gpr_time_from_minutes_type) GetProcAddress(library, "gpr_time_from_minutes");
+  gpr_time_from_hours_import = (gpr_time_from_hours_type) GetProcAddress(library, "gpr_time_from_hours");
+  gpr_time_to_millis_import = (gpr_time_to_millis_type) GetProcAddress(library, "gpr_time_to_millis");
+  gpr_time_similar_import = (gpr_time_similar_type) GetProcAddress(library, "gpr_time_similar");
+  gpr_sleep_until_import = (gpr_sleep_until_type) GetProcAddress(library, "gpr_sleep_until");
+  gpr_timespec_to_micros_import = (gpr_timespec_to_micros_type) GetProcAddress(library, "gpr_timespec_to_micros");
 }
 
 #endif /* GPR_WINDOWS */
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.h b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
index 9563e95..fccefb4 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.h
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
@@ -50,7 +50,6 @@
 #include <grpc/impl/codegen/slice.h>
 #include <grpc/impl/codegen/slice_buffer.h>
 #include <grpc/impl/codegen/sync.h>
-#include <grpc/impl/codegen/time.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/avl.h>
 #include <grpc/support/cmdline.h>
@@ -61,6 +60,7 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/subprocess.h>
 #include <grpc/support/thd.h>
+#include <grpc/support/time.h>
 
 typedef grpc_byte_buffer *(*grpc_raw_byte_buffer_create_type)(gpr_slice *slices, size_t nslices);
 extern grpc_raw_byte_buffer_create_type grpc_raw_byte_buffer_create_import;
@@ -635,69 +635,6 @@
 typedef intptr_t(*gpr_stats_read_type)(const gpr_stats_counter *c);
 extern gpr_stats_read_type gpr_stats_read_import;
 #define gpr_stats_read gpr_stats_read_import
-typedef gpr_timespec(*gpr_time_0_type)(gpr_clock_type type);
-extern gpr_time_0_type gpr_time_0_import;
-#define gpr_time_0 gpr_time_0_import
-typedef gpr_timespec(*gpr_inf_future_type)(gpr_clock_type type);
-extern gpr_inf_future_type gpr_inf_future_import;
-#define gpr_inf_future gpr_inf_future_import
-typedef gpr_timespec(*gpr_inf_past_type)(gpr_clock_type type);
-extern gpr_inf_past_type gpr_inf_past_import;
-#define gpr_inf_past gpr_inf_past_import
-typedef void(*gpr_time_init_type)(void);
-extern gpr_time_init_type gpr_time_init_import;
-#define gpr_time_init gpr_time_init_import
-typedef gpr_timespec(*gpr_now_type)(gpr_clock_type clock);
-extern gpr_now_type gpr_now_import;
-#define gpr_now gpr_now_import
-typedef gpr_timespec(*gpr_convert_clock_type_type)(gpr_timespec t, gpr_clock_type target_clock);
-extern gpr_convert_clock_type_type gpr_convert_clock_type_import;
-#define gpr_convert_clock_type gpr_convert_clock_type_import
-typedef int(*gpr_time_cmp_type)(gpr_timespec a, gpr_timespec b);
-extern gpr_time_cmp_type gpr_time_cmp_import;
-#define gpr_time_cmp gpr_time_cmp_import
-typedef gpr_timespec(*gpr_time_max_type)(gpr_timespec a, gpr_timespec b);
-extern gpr_time_max_type gpr_time_max_import;
-#define gpr_time_max gpr_time_max_import
-typedef gpr_timespec(*gpr_time_min_type)(gpr_timespec a, gpr_timespec b);
-extern gpr_time_min_type gpr_time_min_import;
-#define gpr_time_min gpr_time_min_import
-typedef gpr_timespec(*gpr_time_add_type)(gpr_timespec a, gpr_timespec b);
-extern gpr_time_add_type gpr_time_add_import;
-#define gpr_time_add gpr_time_add_import
-typedef gpr_timespec(*gpr_time_sub_type)(gpr_timespec a, gpr_timespec b);
-extern gpr_time_sub_type gpr_time_sub_import;
-#define gpr_time_sub gpr_time_sub_import
-typedef gpr_timespec(*gpr_time_from_micros_type)(int64_t x, gpr_clock_type clock_type);
-extern gpr_time_from_micros_type gpr_time_from_micros_import;
-#define gpr_time_from_micros gpr_time_from_micros_import
-typedef gpr_timespec(*gpr_time_from_nanos_type)(int64_t x, gpr_clock_type clock_type);
-extern gpr_time_from_nanos_type gpr_time_from_nanos_import;
-#define gpr_time_from_nanos gpr_time_from_nanos_import
-typedef gpr_timespec(*gpr_time_from_millis_type)(int64_t x, gpr_clock_type clock_type);
-extern gpr_time_from_millis_type gpr_time_from_millis_import;
-#define gpr_time_from_millis gpr_time_from_millis_import
-typedef gpr_timespec(*gpr_time_from_seconds_type)(int64_t x, gpr_clock_type clock_type);
-extern gpr_time_from_seconds_type gpr_time_from_seconds_import;
-#define gpr_time_from_seconds gpr_time_from_seconds_import
-typedef gpr_timespec(*gpr_time_from_minutes_type)(int64_t x, gpr_clock_type clock_type);
-extern gpr_time_from_minutes_type gpr_time_from_minutes_import;
-#define gpr_time_from_minutes gpr_time_from_minutes_import
-typedef gpr_timespec(*gpr_time_from_hours_type)(int64_t x, gpr_clock_type clock_type);
-extern gpr_time_from_hours_type gpr_time_from_hours_import;
-#define gpr_time_from_hours gpr_time_from_hours_import
-typedef int32_t(*gpr_time_to_millis_type)(gpr_timespec timespec);
-extern gpr_time_to_millis_type gpr_time_to_millis_import;
-#define gpr_time_to_millis gpr_time_to_millis_import
-typedef int(*gpr_time_similar_type)(gpr_timespec a, gpr_timespec b, gpr_timespec threshold);
-extern gpr_time_similar_type gpr_time_similar_import;
-#define gpr_time_similar gpr_time_similar_import
-typedef void(*gpr_sleep_until_type)(gpr_timespec until);
-extern gpr_sleep_until_type gpr_sleep_until_import;
-#define gpr_sleep_until gpr_sleep_until_import
-typedef double(*gpr_timespec_to_micros_type)(gpr_timespec t);
-extern gpr_timespec_to_micros_type gpr_timespec_to_micros_import;
-#define gpr_timespec_to_micros gpr_timespec_to_micros_import
 typedef void *(*gpr_malloc_type)(size_t size);
 extern gpr_malloc_type gpr_malloc_import;
 #define gpr_malloc gpr_malloc_import
@@ -875,6 +812,69 @@
 typedef void(*gpr_thd_join_type)(gpr_thd_id t);
 extern gpr_thd_join_type gpr_thd_join_import;
 #define gpr_thd_join gpr_thd_join_import
+typedef gpr_timespec(*gpr_time_0_type)(gpr_clock_type type);
+extern gpr_time_0_type gpr_time_0_import;
+#define gpr_time_0 gpr_time_0_import
+typedef gpr_timespec(*gpr_inf_future_type)(gpr_clock_type type);
+extern gpr_inf_future_type gpr_inf_future_import;
+#define gpr_inf_future gpr_inf_future_import
+typedef gpr_timespec(*gpr_inf_past_type)(gpr_clock_type type);
+extern gpr_inf_past_type gpr_inf_past_import;
+#define gpr_inf_past gpr_inf_past_import
+typedef void(*gpr_time_init_type)(void);
+extern gpr_time_init_type gpr_time_init_import;
+#define gpr_time_init gpr_time_init_import
+typedef gpr_timespec(*gpr_now_type)(gpr_clock_type clock);
+extern gpr_now_type gpr_now_import;
+#define gpr_now gpr_now_import
+typedef gpr_timespec(*gpr_convert_clock_type_type)(gpr_timespec t, gpr_clock_type target_clock);
+extern gpr_convert_clock_type_type gpr_convert_clock_type_import;
+#define gpr_convert_clock_type gpr_convert_clock_type_import
+typedef int(*gpr_time_cmp_type)(gpr_timespec a, gpr_timespec b);
+extern gpr_time_cmp_type gpr_time_cmp_import;
+#define gpr_time_cmp gpr_time_cmp_import
+typedef gpr_timespec(*gpr_time_max_type)(gpr_timespec a, gpr_timespec b);
+extern gpr_time_max_type gpr_time_max_import;
+#define gpr_time_max gpr_time_max_import
+typedef gpr_timespec(*gpr_time_min_type)(gpr_timespec a, gpr_timespec b);
+extern gpr_time_min_type gpr_time_min_import;
+#define gpr_time_min gpr_time_min_import
+typedef gpr_timespec(*gpr_time_add_type)(gpr_timespec a, gpr_timespec b);
+extern gpr_time_add_type gpr_time_add_import;
+#define gpr_time_add gpr_time_add_import
+typedef gpr_timespec(*gpr_time_sub_type)(gpr_timespec a, gpr_timespec b);
+extern gpr_time_sub_type gpr_time_sub_import;
+#define gpr_time_sub gpr_time_sub_import
+typedef gpr_timespec(*gpr_time_from_micros_type)(int64_t x, gpr_clock_type clock_type);
+extern gpr_time_from_micros_type gpr_time_from_micros_import;
+#define gpr_time_from_micros gpr_time_from_micros_import
+typedef gpr_timespec(*gpr_time_from_nanos_type)(int64_t x, gpr_clock_type clock_type);
+extern gpr_time_from_nanos_type gpr_time_from_nanos_import;
+#define gpr_time_from_nanos gpr_time_from_nanos_import
+typedef gpr_timespec(*gpr_time_from_millis_type)(int64_t x, gpr_clock_type clock_type);
+extern gpr_time_from_millis_type gpr_time_from_millis_import;
+#define gpr_time_from_millis gpr_time_from_millis_import
+typedef gpr_timespec(*gpr_time_from_seconds_type)(int64_t x, gpr_clock_type clock_type);
+extern gpr_time_from_seconds_type gpr_time_from_seconds_import;
+#define gpr_time_from_seconds gpr_time_from_seconds_import
+typedef gpr_timespec(*gpr_time_from_minutes_type)(int64_t x, gpr_clock_type clock_type);
+extern gpr_time_from_minutes_type gpr_time_from_minutes_import;
+#define gpr_time_from_minutes gpr_time_from_minutes_import
+typedef gpr_timespec(*gpr_time_from_hours_type)(int64_t x, gpr_clock_type clock_type);
+extern gpr_time_from_hours_type gpr_time_from_hours_import;
+#define gpr_time_from_hours gpr_time_from_hours_import
+typedef int32_t(*gpr_time_to_millis_type)(gpr_timespec timespec);
+extern gpr_time_to_millis_type gpr_time_to_millis_import;
+#define gpr_time_to_millis gpr_time_to_millis_import
+typedef int(*gpr_time_similar_type)(gpr_timespec a, gpr_timespec b, gpr_timespec threshold);
+extern gpr_time_similar_type gpr_time_similar_import;
+#define gpr_time_similar gpr_time_similar_import
+typedef void(*gpr_sleep_until_type)(gpr_timespec until);
+extern gpr_sleep_until_type gpr_sleep_until_import;
+#define gpr_sleep_until gpr_sleep_until_import
+typedef double(*gpr_timespec_to_micros_type)(gpr_timespec t);
+extern gpr_timespec_to_micros_type gpr_timespec_to_micros_import;
+#define gpr_timespec_to_micros gpr_timespec_to_micros_import
 
 void grpc_rb_load_imports(HMODULE library);
 
diff --git a/test/core/surface/public_headers_must_be_c89.c b/test/core/surface/public_headers_must_be_c89.c
index f9aaf59..ec901a1 100644
--- a/test/core/surface/public_headers_must_be_c89.c
+++ b/test/core/surface/public_headers_must_be_c89.c
@@ -51,7 +51,6 @@
 #include <grpc/impl/codegen/status.h>
 #include <grpc/impl/codegen/sync.h>
 #include <grpc/impl/codegen/sync_generic.h>
-#include <grpc/impl/codegen/time.h>
 #include <grpc/status.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/atm.h>
diff --git a/test/cpp/codegen/codegen_test_full.cc b/test/cpp/codegen/codegen_test_full.cc
index 4500540..d6e2416 100644
--- a/test/cpp/codegen/codegen_test_full.cc
+++ b/test/cpp/codegen/codegen_test_full.cc
@@ -32,6 +32,7 @@
  */
 
 #include <grpc++/completion_queue.h>
+#include <grpc/support/time.h>
 #include <gtest/gtest.h>
 
 namespace grpc {
diff --git a/tools/doxygen/Doxyfile.c++ b/tools/doxygen/Doxyfile.c++
index c18218d..d7eab48 100644
--- a/tools/doxygen/Doxyfile.c++
+++ b/tools/doxygen/Doxyfile.c++
@@ -854,8 +854,7 @@
 include/grpc/impl/codegen/sync.h \
 include/grpc/impl/codegen/sync_generic.h \
 include/grpc/impl/codegen/sync_posix.h \
-include/grpc/impl/codegen/sync_windows.h \
-include/grpc/impl/codegen/time.h
+include/grpc/impl/codegen/sync_windows.h
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal
index ac90a18..beab3e1 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -855,7 +855,6 @@
 include/grpc/impl/codegen/sync_generic.h \
 include/grpc/impl/codegen/sync_posix.h \
 include/grpc/impl/codegen/sync_windows.h \
-include/grpc/impl/codegen/time.h \
 include/grpc++/impl/codegen/core_codegen.h \
 src/cpp/client/secure_credentials.h \
 src/cpp/common/secure_auth_context.h \
diff --git a/tools/doxygen/Doxyfile.core b/tools/doxygen/Doxyfile.core
index 3e6d19f..af07968 100644
--- a/tools/doxygen/Doxyfile.core
+++ b/tools/doxygen/Doxyfile.core
@@ -784,7 +784,6 @@
 include/grpc/impl/codegen/sync_generic.h \
 include/grpc/impl/codegen/sync_posix.h \
 include/grpc/impl/codegen/sync_windows.h \
-include/grpc/impl/codegen/time.h \
 include/grpc/grpc_security.h \
 include/grpc/grpc_security_constants.h \
 include/grpc/census.h \
@@ -827,8 +826,7 @@
 include/grpc/impl/codegen/sync.h \
 include/grpc/impl/codegen/sync_generic.h \
 include/grpc/impl/codegen/sync_posix.h \
-include/grpc/impl/codegen/sync_windows.h \
-include/grpc/impl/codegen/time.h
+include/grpc/impl/codegen/sync_windows.h
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index bc63c94..9c73359 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -784,7 +784,6 @@
 include/grpc/impl/codegen/sync_generic.h \
 include/grpc/impl/codegen/sync_posix.h \
 include/grpc/impl/codegen/sync_windows.h \
-include/grpc/impl/codegen/time.h \
 include/grpc/grpc_security.h \
 include/grpc/grpc_security_constants.h \
 include/grpc/census.h \
@@ -1171,7 +1170,6 @@
 include/grpc/impl/codegen/sync_generic.h \
 include/grpc/impl/codegen/sync_posix.h \
 include/grpc/impl/codegen/sync_windows.h \
-include/grpc/impl/codegen/time.h \
 src/core/lib/profiling/timers.h \
 src/core/lib/support/backoff.h \
 src/core/lib/support/block_annotate.h \
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index a3ed76f..295e877 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -5664,8 +5664,7 @@
       "include/grpc/impl/codegen/sync.h", 
       "include/grpc/impl/codegen/sync_generic.h", 
       "include/grpc/impl/codegen/sync_posix.h", 
-      "include/grpc/impl/codegen/sync_windows.h", 
-      "include/grpc/impl/codegen/time.h"
+      "include/grpc/impl/codegen/sync_windows.h"
     ], 
     "language": "c", 
     "name": "gpr_codegen", 
@@ -5681,8 +5680,7 @@
       "include/grpc/impl/codegen/sync.h", 
       "include/grpc/impl/codegen/sync_generic.h", 
       "include/grpc/impl/codegen/sync_posix.h", 
-      "include/grpc/impl/codegen/sync_windows.h", 
-      "include/grpc/impl/codegen/time.h"
+      "include/grpc/impl/codegen/sync_windows.h"
     ], 
     "third_party": false, 
     "type": "filegroup"
diff --git a/vsprojects/vcxproj/gpr/gpr.vcxproj b/vsprojects/vcxproj/gpr/gpr.vcxproj
index 4b3383b..5df3434 100644
--- a/vsprojects/vcxproj/gpr/gpr.vcxproj
+++ b/vsprojects/vcxproj/gpr/gpr.vcxproj
@@ -187,7 +187,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\profiling\timers.h" />
diff --git a/vsprojects/vcxproj/gpr/gpr.vcxproj.filters b/vsprojects/vcxproj/gpr/gpr.vcxproj.filters
index 45638be..4bfef3e 100644
--- a/vsprojects/vcxproj/gpr/gpr.vcxproj.filters
+++ b/vsprojects/vcxproj/gpr/gpr.vcxproj.filters
@@ -258,9 +258,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\profiling\timers.h">
diff --git a/vsprojects/vcxproj/grpc++/grpc++.vcxproj b/vsprojects/vcxproj/grpc++/grpc++.vcxproj
index 0878cbb..2538583 100644
--- a/vsprojects/vcxproj/grpc++/grpc++.vcxproj
+++ b/vsprojects/vcxproj/grpc++/grpc++.vcxproj
@@ -353,7 +353,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\core_codegen.h" />
diff --git a/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters b/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters
index e92e43b..e356826 100644
--- a/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters
@@ -387,9 +387,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\core_codegen.h">
diff --git a/vsprojects/vcxproj/grpc++_reflection/grpc++_reflection.vcxproj b/vsprojects/vcxproj/grpc++_reflection/grpc++_reflection.vcxproj
index 0cc3245..af509e7 100644
--- a/vsprojects/vcxproj/grpc++_reflection/grpc++_reflection.vcxproj
+++ b/vsprojects/vcxproj/grpc++_reflection/grpc++_reflection.vcxproj
@@ -199,7 +199,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config_protobuf.h" />
   </ItemGroup>
   <ItemGroup>
diff --git a/vsprojects/vcxproj/grpc++_reflection/grpc++_reflection.vcxproj.filters b/vsprojects/vcxproj/grpc++_reflection/grpc++_reflection.vcxproj.filters
index 8d0c9a8..e40f429 100644
--- a/vsprojects/vcxproj/grpc++_reflection/grpc++_reflection.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc++_reflection/grpc++_reflection.vcxproj.filters
@@ -171,9 +171,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config_protobuf.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj b/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj
index b3f1df5..8146f08 100644
--- a/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj
+++ b/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj
@@ -195,7 +195,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\proto_utils.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\config_protobuf.h" />
   </ItemGroup>
diff --git a/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj.filters b/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj.filters
index 23cbbfd..66f264e 100644
--- a/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj.filters
@@ -177,9 +177,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc++\impl\codegen\proto_utils.h">
       <Filter>include\grpc++\impl\codegen</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj
index cfb87d2..28247a2 100644
--- a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj
@@ -353,7 +353,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\src\cpp\client\create_channel_internal.h" />
diff --git a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
index 22d19ff..2890126 100644
--- a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
@@ -372,9 +372,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\src\cpp\client\create_channel_internal.h">
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index 6945ff5..cbe0404 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -291,7 +291,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_security.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_security_constants.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\census.h" />
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index b7aefec..d7ebb21 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -636,9 +636,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_security.h">
       <Filter>include\grpc</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index b68301c..f5a1765 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -282,7 +282,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\census.h" />
   </ItemGroup>
   <ItemGroup>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index 2f86004..5e00569 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -549,9 +549,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\census.h">
       <Filter>include\grpc</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/test/codegen_test_full/codegen_test_full.vcxproj b/vsprojects/vcxproj/test/codegen_test_full/codegen_test_full.vcxproj
index 6533b1f..71894e0 100644
--- a/vsprojects/vcxproj/test/codegen_test_full/codegen_test_full.vcxproj
+++ b/vsprojects/vcxproj/test/codegen_test_full/codegen_test_full.vcxproj
@@ -208,7 +208,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="$(SolutionDir)\..\src\proto\grpc\testing\control.pb.cc">
diff --git a/vsprojects/vcxproj/test/codegen_test_full/codegen_test_full.vcxproj.filters b/vsprojects/vcxproj/test/codegen_test_full/codegen_test_full.vcxproj.filters
index 73acaf4..eeff877 100644
--- a/vsprojects/vcxproj/test/codegen_test_full/codegen_test_full.vcxproj.filters
+++ b/vsprojects/vcxproj/test/codegen_test_full/codegen_test_full.vcxproj.filters
@@ -165,9 +165,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
   </ItemGroup>
 
   <ItemGroup>
diff --git a/vsprojects/vcxproj/test/codegen_test_minimal/codegen_test_minimal.vcxproj b/vsprojects/vcxproj/test/codegen_test_minimal/codegen_test_minimal.vcxproj
index 9ff5b79..f6f15c1 100644
--- a/vsprojects/vcxproj/test/codegen_test_minimal/codegen_test_minimal.vcxproj
+++ b/vsprojects/vcxproj/test/codegen_test_minimal/codegen_test_minimal.vcxproj
@@ -208,7 +208,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_generic.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="$(SolutionDir)\..\src\proto\grpc\testing\control.pb.cc">
diff --git a/vsprojects/vcxproj/test/codegen_test_minimal/codegen_test_minimal.vcxproj.filters b/vsprojects/vcxproj/test/codegen_test_minimal/codegen_test_minimal.vcxproj.filters
index babdf1a..2297d91 100644
--- a/vsprojects/vcxproj/test/codegen_test_minimal/codegen_test_minimal.vcxproj.filters
+++ b/vsprojects/vcxproj/test/codegen_test_minimal/codegen_test_minimal.vcxproj.filters
@@ -168,9 +168,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
-      <Filter>include\grpc\impl\codegen</Filter>
-    </ClInclude>
   </ItemGroup>
 
   <ItemGroup>