cc: Use BeginFrameArgs

cc/trees/layer_tree_host.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/layer_tree_host.h"
 
 #include <algorithm>
 #include <stack>
 
 #include "base/bind.h"
@@ skipping 946 matching lines @@
   in_paint_layer_contents_ = false;
 
   rendering_stats_instrumentation_->AddStats(stats);
 
   occlusion_tracker.overdraw_metrics()->RecordMetrics(this);
 
   return need_more_updates;
 }
 
 void LayerTreeHost::ApplyScrollAndScale(const ScrollAndScaleSet& info) {
+TRACE_EVENT0("cc", __PRETTY_FUNCTION__);
   if (!root_layer_.get())
     return;
-
+TRACE_EVENT0("cc", __PRETTY_FUNCTION__);
   Layer* root_scroll_layer = FindFirstScrollableLayer(root_layer_.get());
   gfx::Vector2d root_scroll_delta;
 
   for (size_t i = 0; i < info.scrolls.size(); ++i) {
     Layer* layer =
         LayerTreeHostCommon::FindLayerInSubtree(root_layer_.get(),
                                                 info.scrolls[i].layer_id);
     if (!layer)
       continue;
     if (layer == root_scroll_layer) {
@@ skipping 101 matching lines @@
     bool start_ready_animations = true;
     (*iter).second->UpdateState(start_ready_animations, NULL);
   }
 }
 
 skia::RefPtr<SkPicture> LayerTreeHost::CapturePicture() {
   return proxy_->CapturePicture();
 }
 
 }  // namespace cc