cc: Delete unused AnimationCurve::AffectsScale and related code

cc/animation/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_ANIMATION_CURVE_H_
 #define CC_ANIMATION_ANIMATION_CURVE_H_
 
 #include <memory>
 
 #include "base/time/time.h"
@@ skipping 59 matching lines @@
   ~TransformAnimationCurve() override {}
 
   virtual gfx::Transform GetValue(base::TimeDelta t) const = 0;
 
   // Sets |bounds| to be the bounding box for the region within which |box|
   // will move during this animation. If this region cannot be computed,
   // returns false.
   virtual bool AnimatedBoundsForBox(const gfx::BoxF& box,
                                     gfx::BoxF* bounds) const = 0;
 
-  // Returns true if this animation affects scale.
-  virtual bool AffectsScale() const = 0;
-
   // Returns true if this animation is a translation.
   virtual bool IsTranslation() const = 0;
 
   // Returns true if this animation preserves axis alignment.
   virtual bool PreservesAxisAlignment() const = 0;
 
   // Animation start scale
   virtual bool AnimationStartScale(bool forward_direction,
                                    float* start_scale) const = 0;
 
@@ skipping 16 matching lines @@
   virtual FilterOperations GetValue(base::TimeDelta t) const = 0;
   virtual bool HasFilterThatMovesPixels() const = 0;
 
   // Partial Animation implementation.
   CurveType Type() const override;
 };
 
 }  // namespace cc
 
 #endif  // CC_ANIMATION_ANIMATION_CURVE_H_