cc: Record statistics about approximated content.

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 "base/values.h"
 #include "cc/debug/rendering_stats.h"
 
 namespace cc {
 
 MainThreadRenderingStats::MainThreadRenderingStats()
@@ skipping 15 matching lines @@
 void MainThreadRenderingStats::Add(const MainThreadRenderingStats& other) {
   frame_count += other.frame_count;
   paint_time += other.paint_time;
   painted_pixel_count += other.painted_pixel_count;
   record_time += other.record_time;
   recorded_pixel_count += other.recorded_pixel_count;
 }
 
 ImplThreadRenderingStats::ImplThreadRenderingStats()
     : frame_count(0),
-      rasterized_pixel_count(0) {}
+      rasterized_pixel_count(0),
+      visible_content_area(0),
+      approximated_visible_content_area(0) {
+}
 
 scoped_refptr<base::debug::ConvertableToTraceFormat>
 ImplThreadRenderingStats::AsTraceableData() const {
   scoped_ptr<base::DictionaryValue> record_data(new base::DictionaryValue());
   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);
   return TracedValue::FromValue(record_data.release());
 }
 
 void 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;
 }
 
 void RenderingStats::Add(const RenderingStats& other) {
   main_stats.Add(other.main_stats);
   impl_stats.Add(other.impl_stats);
 }
 
 }  // namespace cc