Adding hooks for gathering total pixels painted and rasterized stats.

cc/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/rendering_stats.h"
+
+namespace cc {
+
+RenderingStats::RenderingStats()
+    : numAnimationFrames(0),
+      numFramesSentToScreen(0),
+      droppedFrameCount(0),
+      totalPaintTimeInSeconds(0),
+      totalRasterizeTimeInSeconds(0),
+      totalCommitTimeInSeconds(0),
+      totalCommitCount(0),
+      totalPixelsPainted(0),
+      totalPixelsRasterized(0),
+      numImplThreadScrolls(0),
+      numMainThreadScrolls(0) {
+}
+
+}  // namespace cc