Update from https://crrev.com/303153

cc/debug/rendering_stats.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/debug/rendering_stats.h"
 
 namespace cc {
 
 RenderingStats::TimeDeltaList::TimeDeltaList() {
 }
@@ skipping 10 matching lines @@
   std::list<base::TimeDelta>::const_iterator iter;
   for (iter = values.begin(); iter != values.end(); ++iter) {
     list_value->AppendDouble(iter->InMillisecondsF());
   }
 }
 
 void RenderingStats::TimeDeltaList::Add(const TimeDeltaList& other) {
   values.insert(values.end(), other.values.begin(), other.values.end());
 }
 
+base::TimeDelta RenderingStats::TimeDeltaList::GetLastTimeDelta() const {
+  return values.empty() ? base::TimeDelta() : values.back();
+}
+
 RenderingStats::MainThreadRenderingStats::MainThreadRenderingStats()
     : painted_pixel_count(0), recorded_pixel_count(0) {
 }
 
 RenderingStats::MainThreadRenderingStats::~MainThreadRenderingStats() {
 }
 
 scoped_refptr<base::debug::ConvertableToTraceFormat>
 RenderingStats::MainThreadRenderingStats::AsTraceableData() const {
   scoped_refptr<base::debug::TracedValue> record_data =
       new base::debug::TracedValue();
   record_data->SetDouble("paint_time", paint_time.InSecondsF());
   record_data->SetInteger("painted_pixel_count", painted_pixel_count);
   record_data->SetDouble("record_time", record_time.InSecondsF());
   record_data->SetInteger("recorded_pixel_count", recorded_pixel_count);
   return record_data;
 }
 
 void RenderingStats::MainThreadRenderingStats::Add(
     const MainThreadRenderingStats& other) {
   paint_time += other.paint_time;
   painted_pixel_count += other.painted_pixel_count;
   record_time += other.record_time;
   recorded_pixel_count += other.recorded_pixel_count;
 }
 
 RenderingStats::ImplThreadRenderingStats::ImplThreadRenderingStats()
     : frame_count(0),
-      rasterized_pixel_count(0),
       visible_content_area(0),
       approximated_visible_content_area(0) {
 }
 
 RenderingStats::ImplThreadRenderingStats::~ImplThreadRenderingStats() {
 }
 
 scoped_refptr<base::debug::ConvertableToTraceFormat>
 RenderingStats::ImplThreadRenderingStats::AsTraceableData() const {
   scoped_refptr<base::debug::TracedValue> record_data =
       new base::debug::TracedValue();
   record_data->SetInteger("frame_count", frame_count);
-  record_data->SetDouble("rasterize_time", rasterize_time.InSecondsF());
-  record_data->SetInteger("rasterized_pixel_count", rasterized_pixel_count);
   record_data->SetInteger("visible_content_area", visible_content_area);
   record_data->SetInteger("approximated_visible_content_area",
                           approximated_visible_content_area);
   record_data->BeginArray("draw_duration_ms");
   draw_duration.AddToTracedValue(record_data.get());
   record_data->EndArray();
 
   record_data->BeginArray("draw_duration_estimate_ms");
   draw_duration_estimate.AddToTracedValue(record_data.get());
   record_data->EndArray();
@@ skipping 13 matching lines @@
 
   record_data->BeginArray("commit_to_activate_duration_estimate_ms");
   commit_to_activate_duration_estimate.AddToTracedValue(record_data.get());
   record_data->EndArray();
   return record_data;
 }
 
 void RenderingStats::ImplThreadRenderingStats::Add(
     const ImplThreadRenderingStats& other) {
   frame_count += other.frame_count;
-  rasterize_time += other.rasterize_time;
-  analysis_time += other.analysis_time;
-  rasterized_pixel_count += other.rasterized_pixel_count;
   visible_content_area += other.visible_content_area;
   approximated_visible_content_area += other.approximated_visible_content_area;
 
   draw_duration.Add(other.draw_duration);
   draw_duration_estimate.Add(other.draw_duration_estimate);
   begin_main_frame_to_commit_duration.Add(
       other.begin_main_frame_to_commit_duration);
   begin_main_frame_to_commit_duration_estimate.Add(
       other.begin_main_frame_to_commit_duration_estimate);
   commit_to_activate_duration.Add(other.commit_to_activate_duration);
   commit_to_activate_duration_estimate.Add(
       other.commit_to_activate_duration_estimate);
 }
 
 void RenderingStats::Add(const RenderingStats& other) {
   main_stats.Add(other.main_stats);
   impl_stats.Add(other.impl_stats);
 }
 
 }  // namespace cc