cc: Make PictureLayerImpl use a better choice for animated raster scale.

cc/animation/layer_animation_controller.h

 // 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.
 
 #ifndef CC_ANIMATION_LAYER_ANIMATION_CONTROLLER_H_
 #define CC_ANIMATION_LAYER_ANIMATION_CONTROLLER_H_
 
 #include "base/basictypes.h"
 #include "base/containers/hash_tables.h"
 #include "base/memory/ref_counted.h"
@@ skipping 116 matching lines @@
 
   bool FilterAnimationBoundsForBox(const gfx::BoxF& box,
                                    gfx::BoxF* bounds) const;
   bool TransformAnimationBoundsForBox(const gfx::BoxF& box,
                                       gfx::BoxF* bounds) const;
 
   bool HasAnimationThatAffectsScale() const;
 
   bool HasOnlyTranslationTransforms() const;
 
-  // Sets |max_scale| to the maximum scale along any dimension during active
-  // animations. Returns false if the maximum scale cannot be computed.
-  bool MaximumScale(float* max_scale) const;
+  // Sets |max_scale| to the maximum scale along any dimension at any
+  // destination in active animations. Returns false if the maximum scale cannot
+  // be computed.
+  bool MaximumTargetScale(float* max_scale) const;
 
   bool needs_to_start_animations_for_testing() {
     return needs_to_start_animations_;
   }
 
  protected:
   friend class base::RefCounted<LayerAnimationController>;
 
   explicit LayerAnimationController(int id);
   virtual ~LayerAnimationController();
@@ skipping 62 matching lines @@
   // Only try to start animations when new animations are added or when the
   // previous attempt at starting animations failed to start all animations.
   bool needs_to_start_animations_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerAnimationController);
 };
 
 }  // namespace cc
 
 #endif  // CC_ANIMATION_LAYER_ANIMATION_CONTROLLER_H_