cc: Add UMA stats for record and raster time.

cc/resources/display_list_recording_source.cc

 // Copyright 2014 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/resources/display_list_recording_source.h"
 
 #include <algorithm>
 
 #include "cc/base/region.h"
 #include "cc/layers/content_layer_client.h"
@@ skipping 30 matching lines @@
 
 DisplayListRecordingSource::~DisplayListRecordingSource() {
 }
 
 bool DisplayListRecordingSource::UpdateAndExpandInvalidation(
     ContentLayerClient* painter,
     Region* invalidation,
     const gfx::Size& layer_size,
     const gfx::Rect& visible_layer_rect,
     int frame_number,
-    RecordingMode recording_mode) {
+    RecordingMode recording_mode,
+    int* recorded_area) {
   bool updated = false;
 
   if (size_ != layer_size) {
     size_ = layer_size;
     updated = true;
   }
 
   gfx::Rect old_recorded_viewport = recorded_viewport_;
   recorded_viewport_ = visible_layer_rect;
   recorded_viewport_.Inset(-pixel_record_distance_, -pixel_record_distance_);
@@ skipping 51 matching lines @@
   is_suitable_for_gpu_rasterization_ =
       display_list_->IsSuitableForGpuRasterization();
 
   DetermineIfSolidColor();
   display_list_->EmitTraceSnapshot();
 
   display_list_->CreateAndCacheSkPicture();
   if (gather_pixel_refs_)
     display_list_->GatherPixelRefs(grid_cell_size_);
 
+  if (recorded_area)
+    *recorded_area = recorded_viewport_.size().GetArea();
+
   return true;
 }
 
 gfx::Size DisplayListRecordingSource::GetSize() const {
   return size_;
 }
 
 void DisplayListRecordingSource::SetEmptyBounds() {
   size_ = gfx::Size();
   Clear();
@@ skipping 48 matching lines @@
   is_solid_color_ = canvas.GetColorIfSolid(&solid_color_);
 }
 
 void DisplayListRecordingSource::Clear() {
   recorded_viewport_ = gfx::Rect();
   display_list_ = NULL;
   is_solid_color_ = false;
 }
 
 }  // namespace cc