cc: Add some tracing below LayerTreeHost::PushProperties.

cc/layers/nine_patch_layer.cc

 // Copyright 2012 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/nine_patch_layer.h"
 
+#include "base/trace_event/trace_event.h"
 #include "cc/layers/nine_patch_layer_impl.h"
 #include "cc/resources/scoped_ui_resource.h"
 #include "cc/resources/ui_resource_bitmap.h"
 #include "cc/trees/layer_tree_host.h"
 
 namespace cc {
 
 scoped_refptr<NinePatchLayer> NinePatchLayer::Create(
     const LayerSettings& settings) {
   return make_scoped_refptr(new NinePatchLayer(settings));
@@ skipping 28 matching lines @@
 void NinePatchLayer::SetFillCenter(bool fill_center) {
   if (fill_center_ == fill_center)
     return;
 
   fill_center_ = fill_center;
   SetNeedsCommit();
 }
 
 void NinePatchLayer::PushPropertiesTo(LayerImpl* layer) {
   UIResourceLayer::PushPropertiesTo(layer);
+  TRACE_EVENT0("cc", "NinePatchLayer::PushPropertiesTo");
   NinePatchLayerImpl* layer_impl = static_cast<NinePatchLayerImpl*>(layer);
 
   if (!ui_resource_holder_) {
     layer_impl->SetUIResourceId(0);
   } else {
     DCHECK(layer_tree_host());
 
     layer_impl->SetLayout(image_aperture_, border_, fill_center_);
   }
 }
 
 }  // namespace cc