Add a bunch of vlogs to RAF related calls in chrome.

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 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 "content/renderer/gpu/render_widget_compositor.h"
 
 #include <limits>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 738 matching lines @@
 void RenderWidgetCompositor::WillBeginMainFrame(int frame_id) {
   widget_->InstrumentWillBeginFrame(frame_id);
   widget_->willBeginCompositorFrame();
 }
 
 void RenderWidgetCompositor::DidBeginMainFrame() {
   widget_->InstrumentDidBeginFrame();
 }
 
 void RenderWidgetCompositor::BeginMainFrame(const cc::BeginFrameArgs& args) {
+  VLOG(2) << "RenderWidgetCompositor::BeginMainFrame";
   begin_main_frame_time_ = args.frame_time;
   begin_main_frame_interval_ = args.interval;
   double frame_time = (args.frame_time - base::TimeTicks()).InSecondsF();
   WebBeginFrameArgs web_begin_frame_args = WebBeginFrameArgs(frame_time);
   widget_->webwidget()->beginFrame(web_begin_frame_args);
 }
 
 void RenderWidgetCompositor::Layout() {
   widget_->webwidget()->layout();
 }
@@ skipping 55 matching lines @@
   widget_->OnSwapBuffersAborted();
 }
 
 void RenderWidgetCompositor::RateLimitSharedMainThreadContext() {
   cc::ContextProvider* provider =
       RenderThreadImpl::current()->SharedMainThreadContextProvider().get();
   provider->ContextGL()->RateLimitOffscreenContextCHROMIUM();
 }
 
 }  // namespace content