Change filename to channelz
diff --git a/CMakeLists.txt b/CMakeLists.txt
index f53f4e3..217de0b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -922,7 +922,7 @@
   src/core/lib/channel/channel_stack.cc
   src/core/lib/channel/channel_stack_builder.cc
   src/core/lib/channel/channel_trace.cc
-  src/core/lib/channel/channel_trace_registry.cc
+  src/core/lib/channel/channelz_registry.cc
   src/core/lib/channel/connected_channel.cc
   src/core/lib/channel/handshaker.cc
   src/core/lib/channel/handshaker_factory.cc
@@ -1315,7 +1315,7 @@
   src/core/lib/channel/channel_stack.cc
   src/core/lib/channel/channel_stack_builder.cc
   src/core/lib/channel/channel_trace.cc
-  src/core/lib/channel/channel_trace_registry.cc
+  src/core/lib/channel/channelz_registry.cc
   src/core/lib/channel/connected_channel.cc
   src/core/lib/channel/handshaker.cc
   src/core/lib/channel/handshaker_factory.cc
@@ -1700,7 +1700,7 @@
   src/core/lib/channel/channel_stack.cc
   src/core/lib/channel/channel_stack_builder.cc
   src/core/lib/channel/channel_trace.cc
-  src/core/lib/channel/channel_trace_registry.cc
+  src/core/lib/channel/channelz_registry.cc
   src/core/lib/channel/connected_channel.cc
   src/core/lib/channel/handshaker.cc
   src/core/lib/channel/handshaker_factory.cc
@@ -2004,7 +2004,7 @@
   src/core/lib/channel/channel_stack.cc
   src/core/lib/channel/channel_stack_builder.cc
   src/core/lib/channel/channel_trace.cc
-  src/core/lib/channel/channel_trace_registry.cc
+  src/core/lib/channel/channelz_registry.cc
   src/core/lib/channel/connected_channel.cc
   src/core/lib/channel/handshaker.cc
   src/core/lib/channel/handshaker_factory.cc
@@ -2287,7 +2287,7 @@
   src/core/lib/channel/channel_stack.cc
   src/core/lib/channel/channel_stack_builder.cc
   src/core/lib/channel/channel_trace.cc
-  src/core/lib/channel/channel_trace_registry.cc
+  src/core/lib/channel/channelz_registry.cc
   src/core/lib/channel/connected_channel.cc
   src/core/lib/channel/handshaker.cc
   src/core/lib/channel/handshaker_factory.cc
@@ -3113,7 +3113,7 @@
   src/core/lib/channel/channel_stack.cc
   src/core/lib/channel/channel_stack_builder.cc
   src/core/lib/channel/channel_trace.cc
-  src/core/lib/channel/channel_trace_registry.cc
+  src/core/lib/channel/channelz_registry.cc
   src/core/lib/channel/connected_channel.cc
   src/core/lib/channel/handshaker.cc
   src/core/lib/channel/handshaker_factory.cc