cc: Measure compositor timing with finer granularity

cc/trees/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/thread_proxy.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 894 matching lines @@
     // sync tree has already activated if there was no work to be done.
     TRACE_EVENT_INSTANT0("cc", "HoldCommit", TRACE_EVENT_SCOPE_THREAD);
     impl().completion_event_for_commit_held_on_tree_activation =
         impl().commit_completion_event;
     impl().commit_completion_event = NULL;
   } else {
     impl().commit_completion_event->Signal();
     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();
 
   SetInputThrottledUntilCommitOnImplThread(false);
 
   impl().next_frame_is_newly_committed_frame = true;
 }
 
 void ThreadProxy::ScheduledActionActivateSyncTree() {
@@ skipping 306 matching lines @@
     TRACE_EVENT_INSTANT0(
         "cc", "ReleaseCommitbyActivation", TRACE_EVENT_SCOPE_THREAD);
     impl().completion_event_for_commit_held_on_tree_activation->Signal();
     impl().completion_event_for_commit_held_on_tree_activation = NULL;
   }
 
   impl().last_processed_begin_main_frame_args =
       impl().last_begin_main_frame_args;
 }
 
+void ThreadProxy::WillPrepareTiles() {
+  DCHECK(IsImplThread());
+  impl().scheduler->WillPrepareTiles();
+}
+
 void ThreadProxy::DidPrepareTiles() {
   DCHECK(IsImplThread());
   impl().scheduler->DidPrepareTiles();
 }
 
 void ThreadProxy::DidCompletePageScaleAnimationOnImplThread() {
   DCHECK(IsImplThread());
   Proxy::MainThreadTaskRunner()->PostTask(
       FROM_HERE, base::Bind(&ThreadProxy::DidCompletePageScaleAnimation,
                             main_thread_weak_ptr_));
@@ skipping 17 matching lines @@
 
 void ThreadProxy::PostFrameTimingEvents(
     scoped_ptr<FrameTimingTracker::CompositeTimingSet> composite_events,
     scoped_ptr<FrameTimingTracker::MainFrameTimingSet> main_frame_events) {
   DCHECK(IsMainThread());
   layer_tree_host()->RecordFrameTimingEvents(composite_events.Pass(),
                                              main_frame_events.Pass());
 }
 
 }  // namespace cc