Adding hooks for gathering total pixels painted and rasterized stats.

cc/BitmapSkPictureCanvasLayerTextureUpdater.cpp

Index: cc/BitmapSkPictureCanvasLayerTextureUpdater.cpp
diff --git a/cc/BitmapSkPictureCanvasLayerTextureUpdater.cpp b/cc/BitmapSkPictureCanvasLayerTextureUpdater.cpp
index adb3b0fc781c125f0c337d4e83bcce34dfbf334e..f1b78148250e00ce2d1446b7a1cf7ab7e05d5803 100644
--- a/cc/BitmapSkPictureCanvasLayerTextureUpdater.cpp
+++ b/cc/BitmapSkPictureCanvasLayerTextureUpdater.cpp
@@ -34,6 +34,7 @@ void BitmapSkPictureCanvasLayerTextureUpdater::Texture::prepareRect(const IntRec
     double paintBeginTime = monotonicallyIncreasingTime();
     textureUpdater()->paintContentsRect(&canvas, sourceRect, stats);
     stats.totalPaintTimeInSeconds += monotonicallyIncreasingTime() - paintBeginTime;
+    stats.totalPixelsPainted += sourceRect.width() * sourceRect.height();
 }
 
 void BitmapSkPictureCanvasLayerTextureUpdater::Texture::updateRect(CCResourceProvider* resourceProvider, const IntRect& sourceRect, const IntSize& destOffset)
@@ -78,6 +79,7 @@ void BitmapSkPictureCanvasLayerTextureUpdater::paintContentsRect(SkCanvas* canva
     double rasterizeBeginTime = monotonicallyIncreasingTime();
     drawPicture(canvas);
     stats.totalRasterizeTimeInSeconds += monotonicallyIncreasingTime() - rasterizeBeginTime;
+    stats.totalPixelsRasterized += sourceRect.width() * sourceRect.height();
 }
 
 } // namespace cc