Revert of cc: Measure compositor timing with finer granularity

cc/trees/thread_proxy.cc

Index: cc/trees/thread_proxy.cc
diff --git a/cc/trees/thread_proxy.cc b/cc/trees/thread_proxy.cc
index 533c4906a011be0c0898e7f2d9d5e7fcb2170bea..248e6aea88f1be109316eadce45fa448b36b78ad 100644
--- a/cc/trees/thread_proxy.cc
+++ b/cc/trees/thread_proxy.cc
@@ -912,8 +912,6 @@
     impl().commit_completion_event = NULL;
   }
 
-  impl().scheduler->DidCommit();
-
   // Delay this step until afer the main thread has been released as it's
   // often a good bit of work to update the tree and prepare the new frame.
   impl().layer_tree_host_impl->CommitComplete();
@@ -1240,11 +1238,6 @@
       impl().last_begin_main_frame_args;
 }
 
-void ThreadProxy::WillPrepareTiles() {
-  DCHECK(IsImplThread());
-  impl().scheduler->WillPrepareTiles();
-}
-
 void ThreadProxy::DidPrepareTiles() {
   DCHECK(IsImplThread());
   impl().scheduler->DidPrepareTiles();