cc: fix another data race in RenderingStatsInstrumentation.

cc/debug/rendering_stats_instrumentation.cc

 // Copyright 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 "cc/debug/rendering_stats_instrumentation.h"
 
 namespace cc {
 
 // static
 scoped_ptr<RenderingStatsInstrumentation>
     RenderingStatsInstrumentation::Create() {
   return make_scoped_ptr(new RenderingStatsInstrumentation());
 }
 
 RenderingStatsInstrumentation::RenderingStatsInstrumentation()
     : record_rendering_stats_(false) {
 }
 
 RenderingStatsInstrumentation::~RenderingStatsInstrumentation() {}
 
+MainThreadRenderingStats
+RenderingStatsInstrumentation::main_thread_rendering_stats() {
+  base::AutoLock scoped_lock(lock_);
+  return main_stats_;
+}
+
+ImplThreadRenderingStats
+RenderingStatsInstrumentation::impl_thread_rendering_stats() {
+  base::AutoLock scoped_lock(lock_);
+  return impl_stats_;
+}
+
 RenderingStats RenderingStatsInstrumentation::GetRenderingStats() {
   base::AutoLock scoped_lock(lock_);
   RenderingStats rendering_stats;
   rendering_stats.main_stats = main_stats_accu_;
   rendering_stats.main_stats.Add(main_stats_);
   rendering_stats.impl_stats = impl_stats_accu_;
   rendering_stats.impl_stats.Add(impl_stats_);
   return rendering_stats;
 }
 
@@ skipping 90 matching lines @@
 void RenderingStatsInstrumentation::AddApproximatedVisibleContentArea(
     int64 area) {
   if (!record_rendering_stats_)
     return;
 
   base::AutoLock scoped_lock(lock_);
   impl_stats_.approximated_visible_content_area += area;
 }
 
 }  // namespace cc