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

cc/animation/keyframed_animation_curve.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_KEYFRAMED_ANIMATION_CURVE_H_
 #define CC_ANIMATION_KEYFRAMED_ANIMATION_CURVE_H_
 
 #include "cc/animation/animation_curve.h"
 #include "cc/animation/timing_function.h"
 #include "cc/animation/transform_operations.h"
@@ skipping 178 matching lines @@
   // AnimationCurve implementation
   virtual double Duration() const override;
   virtual scoped_ptr<AnimationCurve> Clone() const override;
 
   // TransformAnimationCurve implementation
   virtual gfx::Transform GetValue(double t) const override;
   virtual bool AnimatedBoundsForBox(const gfx::BoxF& box,
                                     gfx::BoxF* bounds) const override;
   virtual bool AffectsScale() const override;
   virtual bool IsTranslation() const override;
-  virtual bool MaximumScale(float* max_scale) const override;
+  virtual bool MaximumTargetScale(bool forward_direction,
+                                  float* max_scale) const override;
 
  private:
   KeyframedTransformAnimationCurve();
 
   // Always sorted in order of increasing time. No two keyframes have the
   // same time.
   ScopedPtrVector<TransformKeyframe> keyframes_;
   scoped_ptr<TimingFunction> timing_function_;
 
   DISALLOW_COPY_AND_ASSIGN(KeyframedTransformAnimationCurve);
@@ skipping 27 matching lines @@
   // same time.
   ScopedPtrVector<FilterKeyframe> keyframes_;
   scoped_ptr<TimingFunction> timing_function_;
 
   DISALLOW_COPY_AND_ASSIGN(KeyframedFilterAnimationCurve);
 };
 
 }  // namespace cc
 
 #endif  // CC_ANIMATION_KEYFRAMED_ANIMATION_CURVE_H_