Rasterize at maximum scale for scale animations on CPU-rasterized layers

cc/layers/picture_image_layer_impl.h

Index: cc/layers/picture_image_layer_impl.h
diff --git a/cc/layers/picture_image_layer_impl.h b/cc/layers/picture_image_layer_impl.h
index 0b3b246259d2f2ccf12fc0143771122a2a7f7b9d..483d5f244b254ffae0c1fe4f4a763a81d6bf6584 100644
--- a/cc/layers/picture_image_layer_impl.h
+++ b/cc/layers/picture_image_layer_impl.h
@@ -24,6 +24,7 @@ class CC_EXPORT PictureImageLayerImpl : public PictureLayerImpl {
   virtual void CalculateContentsScale(float ideal_contents_scale,
                                       float device_scale_factor,
                                       float page_scale_factor,
+                                      float maximum_animation_contents_scale,
                                       bool animating_transform_to_screen,
                                       float* contents_scale_x,
                                       float* contents_scale_y,
@@ -34,8 +35,9 @@ class CC_EXPORT PictureImageLayerImpl : public PictureLayerImpl {
 
   virtual bool ShouldAdjustRasterScale(
       bool animating_transform_to_screen) const OVERRIDE;
-  virtual void RecalculateRasterScales(
-      bool animating_transform_to_screen) OVERRIDE;
+  virtual void RecalculateRasterScales(bool animating_transform_to_screen,
+                                       float maximum_animation_contents_scale)
+      OVERRIDE;
   virtual void GetDebugBorderProperties(
       SkColor* color, float* width) const OVERRIDE;