cc: Split Proxy to eliminate unnecessary dependencies on the impl side

cc/debug/frame_timing_tracker.cc

 // Copyright 2015 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/debug/frame_timing_tracker.h"
 
 #include <algorithm>
 #include <limits>
 
 #include "base/metrics/histogram.h"
@@ skipping 26 matching lines @@
 
 // static
 scoped_ptr<FrameTimingTracker> FrameTimingTracker::Create(
     LayerTreeHostImpl* layer_tree_host_impl) {
   return make_scoped_ptr(new FrameTimingTracker(layer_tree_host_impl));
 }
 
 FrameTimingTracker::FrameTimingTracker(LayerTreeHostImpl* layer_tree_host_impl)
     : layer_tree_host_impl_(layer_tree_host_impl),
       post_events_notifier_(
-          layer_tree_host_impl_->proxy()->HasImplThread()
-              ? layer_tree_host_impl_->proxy()->ImplThreadTaskRunner()
-              : layer_tree_host_impl_->proxy()->MainThreadTaskRunner(),
+          layer_tree_host_impl_->GetTaskRunner(),
           base::Bind(&FrameTimingTracker::PostEvents, base::Unretained(this)),
-          base::TimeDelta::FromMilliseconds(kSendTimingIntervalMS)) {
-}
+          base::TimeDelta::FromMilliseconds(kSendTimingIntervalMS)) {}
 
 FrameTimingTracker::~FrameTimingTracker() {
 }
 
 void FrameTimingTracker::SaveTimeStamps(
     base::TimeTicks timestamp,
     const std::vector<FrameAndRectIds>& frame_ids) {
   if (!composite_events_)
     composite_events_.reset(new CompositeTimingSet);
   for (const auto& pair : frame_ids) {
@@ skipping 47 matching lines @@
   }
   return main_frame_events_.Pass();
 }
 
 void FrameTimingTracker::PostEvents() {
   layer_tree_host_impl_->PostFrameTimingEvents(GroupCompositeCountsByRectId(),
                                                GroupMainFrameCountsByRectId());
 }
 
 }  // namespace cc