Isolate timer checking in its own thread
diff --git a/config.m4 b/config.m4
index bbd667c..36c04cf 100644
--- a/config.m4
+++ b/config.m4
@@ -154,6 +154,7 @@
     src/core/lib/iomgr/time_averaged_stats.c \
     src/core/lib/iomgr/timer_generic.c \
     src/core/lib/iomgr/timer_heap.c \
+    src/core/lib/iomgr/timer_manager.c \
     src/core/lib/iomgr/timer_uv.c \
     src/core/lib/iomgr/udp_server.c \
     src/core/lib/iomgr/unix_sockets_posix.c \