Reland: CC: Adjust tiling creation triggers during pinch-zoom.

cc/layers/picture_image_layer_impl.h

 // Copyright 2013 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.
 
 #ifndef CC_LAYERS_PICTURE_IMAGE_LAYER_IMPL_H_
 #define CC_LAYERS_PICTURE_IMAGE_LAYER_IMPL_H_
 
 #include "cc/layers/picture_layer_impl.h"
 
 namespace cc {
@@ skipping 16 matching lines @@
                                       bool animating_transform_to_screen,
                                       float* contents_scale_x,
                                       float* contents_scale_y,
                                       gfx::Size* content_bounds) OVERRIDE;
 
  protected:
   PictureImageLayerImpl(LayerTreeImpl* tree_impl, int id);
 
   virtual bool ShouldAdjustRasterScale(
       bool animating_transform_to_screen) const OVERRIDE;
-  virtual void CalculateRasterContentsScale(
-      bool animating_transform_to_screen,
-      float* raster_contents_scale,
-      float* low_res_raster_contents_scale) const OVERRIDE;
+  virtual void RecalculateRasterScales(
+      bool animating_transform_to_screen) OVERRIDE;
   virtual void GetDebugBorderProperties(
       SkColor* color, float* width) const OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PictureImageLayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_PICTURE_IMAGE_LAYER_IMPL_H_