Revert of cc: Measure compositor timing with finer granularity

cc/trees/single_thread_proxy.cc

Index: cc/trees/single_thread_proxy.cc
diff --git a/cc/trees/single_thread_proxy.cc b/cc/trees/single_thread_proxy.cc
index 9beba7b661576b4abf41c55e943316d58306c575..2bbf75c8a3b15ce3dd6ab57f3fdb5d8e11e2df26 100644
--- a/cc/trees/single_thread_proxy.cc
+++ b/cc/trees/single_thread_proxy.cc
@@ -290,9 +290,6 @@
       << "Activation is expected to have synchronously occurred by now.";
   DCHECK(commit_blocking_task_runner_);
 
-  if (scheduler_on_impl_thread_)
-    scheduler_on_impl_thread_->DidCommit();
-
   // Notify commit complete on the impl side after activate to satisfy any
   // SetNextCommitWaitsForActivation calls.
   layer_tree_host_impl_->CommitComplete();
@@ -456,12 +453,6 @@
   // |commit_blocking_task_runner| would make sure all tasks posted during
   // commit/activation before CommitComplete.
   CommitComplete();
-}
-
-void SingleThreadProxy::WillPrepareTiles() {
-  DCHECK(Proxy::IsImplThread());
-  if (scheduler_on_impl_thread_)
-    scheduler_on_impl_thread_->WillPrepareTiles();
 }
 
 void SingleThreadProxy::DidPrepareTiles() {