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

cc/layers/layer.cc

 // Copyright 2010 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/layers/layer.h"
 
 #include <algorithm>
 
 #include "base/debug/trace_event.h"
 #include "base/location.h"
@@ skipping 404 matching lines @@
         break;
     }
     if (SkColorGetA(color) != 255)
       color = layer_tree_host_->background_color();
     if (SkColorGetA(color) != 255)
       color = SkColorSetA(color, 255);
   }
   return color;
 }
 
-void Layer::CalculateContentsScale(
-    float ideal_contents_scale,
-    float device_scale_factor,
-    float page_scale_factor,
-    bool animating_transform_to_screen,
-    float* contents_scale_x,
-    float* contents_scale_y,
-    gfx::Size* content_bounds) {
+void Layer::CalculateContentsScale(float ideal_contents_scale,
+                                   float device_scale_factor,
+                                   float page_scale_factor,
+                                   float maximum_animation_scale_factor,
+                                   bool animating_transform_to_screen,
+                                   float* contents_scale_x,
+                                   float* contents_scale_y,
+                                   gfx::Size* content_bounds) {
   DCHECK(layer_tree_host_);
 
   *contents_scale_x = 1;
   *contents_scale_y = 1;
   *content_bounds = bounds();
 }
 
 void Layer::SetMasksToBounds(bool masks_to_bounds) {
   DCHECK(IsPropertyChangeAllowed());
   if (masks_to_bounds_ == masks_to_bounds)
@@ skipping 747 matching lines @@
   if (clip_parent_)
     clip_parent_->RemoveClipChild(this);
 
   clip_parent_ = NULL;
 }
 
 void Layer::RunMicroBenchmark(MicroBenchmark* benchmark) {
   benchmark->RunOnLayer(this);
 }
 }  // namespace cc