cc: Measure compositor timing with finer granularity

cc/trees/single_thread_proxy.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/single_thread_proxy.h"
 
 #include "base/auto_reset.h"
 #include "base/profiler/scoped_tracker.h"
 #include "base/trace_event/trace_event.h"
 #include "cc/debug/benchmark_instrumentation.h"
@@ skipping 272 matching lines @@
     // the flag to force the tree to not draw until textures are ready.
     NotifyReadyToActivate();
   }
 }
 
 void SingleThreadProxy::CommitComplete() {
   DCHECK(!layer_tree_host_impl_->pending_tree())
       << "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();
 
   DebugScopedSetMainThread main(this);
   commit_blocking_task_runner_.reset();
   layer_tree_host_->CommitComplete();
   layer_tree_host_->DidBeginMainFrame();
 
   next_frame_is_newly_committed_frame_ = true;
@@ skipping 145 matching lines @@
   // after commit since single thread commits directly to the active tree.
   if (scheduler_on_impl_thread_)
     scheduler_on_impl_thread_->SetWaitForReadyToDraw();
 
   // Synchronously call to CommitComplete. Resetting
   // |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() {
   DCHECK(Proxy::IsImplThread());
   if (scheduler_on_impl_thread_)
     scheduler_on_impl_thread_->DidPrepareTiles();
 }
 
 void SingleThreadProxy::DidCompletePageScaleAnimationOnImplThread() {
   layer_tree_host_->DidCompletePageScaleAnimation();
 }
 
@@ skipping 445 matching lines @@
       << "DidFinishImplFrame called while not inside an impl frame!";
   inside_impl_frame_ = false;
 #endif
 }
 
 void SingleThreadProxy::SendBeginFramesToChildren(const BeginFrameArgs& args) {
   layer_tree_host_->SendBeginFramesToChildren(args);
 }
 
 }  // namespace cc