cc: Add some tracing below LayerTreeHost::PushProperties.

cc/layers/surface_layer.cc

 // Copyright 2014 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/layers/surface_layer.h"
 
 #include <stdint.h>
 
 #include "base/macros.h"
+#include "base/trace_event/trace_event.h"
 #include "cc/layers/surface_layer_impl.h"
 #include "cc/output/swap_promise.h"
 #include "cc/trees/layer_tree_host.h"
 
 namespace cc {
 
 class SatisfySwapPromise : public SwapPromise {
  public:
   SatisfySwapPromise(SurfaceSequence sequence,
                      const SurfaceLayer::SatisfyCallback& satisfy_callback)
@@ skipping 67 matching lines @@
     return;
   }
 
   SatisfyDestroySequence();
   Layer::SetLayerTreeHost(host);
   CreateNewDestroySequence();
 }
 
 void SurfaceLayer::PushPropertiesTo(LayerImpl* layer) {
   Layer::PushPropertiesTo(layer);
+  TRACE_EVENT0("cc", "SurfaceLayer::PushPropertiesTo");
   SurfaceLayerImpl* layer_impl = static_cast<SurfaceLayerImpl*>(layer);
 
   layer_impl->SetSurfaceId(surface_id_);
   layer_impl->SetSurfaceSize(surface_size_);
   layer_impl->SetSurfaceScale(surface_scale_);
 }
 
 void SurfaceLayer::CreateNewDestroySequence() {
   DCHECK(destroy_sequence_.is_null());
   if (layer_tree_host()) {
     destroy_sequence_ = layer_tree_host()->CreateSurfaceSequence();
     require_callback_.Run(surface_id_, destroy_sequence_);
   }
 }
 
 void SurfaceLayer::SatisfyDestroySequence() {
   if (!layer_tree_host())
     return;
   DCHECK(!destroy_sequence_.is_null());
   scoped_ptr<SatisfySwapPromise> satisfy(
       new SatisfySwapPromise(destroy_sequence_, satisfy_callback_));
   layer_tree_host()->QueueSwapPromise(std::move(satisfy));
   destroy_sequence_ = SurfaceSequence();
 }
 
 }  // namespace cc