Rename async_execution_lock --> combiner, make it use closures, unroll previous changes for idleness
diff --git a/config.m4 b/config.m4
index 2974d2e..6ecacb9 100644
--- a/config.m4
+++ b/config.m4
@@ -96,8 +96,8 @@
     src/core/lib/http/format_request.c \
     src/core/lib/http/httpcli.c \
     src/core/lib/http/parser.c \
-    src/core/lib/iomgr/async_execution_lock.c \
     src/core/lib/iomgr/closure.c \
+    src/core/lib/iomgr/combiner.c \
     src/core/lib/iomgr/endpoint.c \
     src/core/lib/iomgr/endpoint_pair_posix.c \
     src/core/lib/iomgr/endpoint_pair_windows.c \