cc: Delete unused AnimationCurve::AffectsScale and related code

cc/test/animation_test_common.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_TEST_ANIMATION_TEST_COMMON_H_
 #define CC_TEST_ANIMATION_TEST_COMMON_H_
 
 #include "cc/animation/animation.h"
 #include "cc/animation/animation_curve.h"
 #include "cc/animation/animation_timeline.h"
@@ skipping 31 matching lines @@
 
 class FakeTransformTransition : public TransformAnimationCurve {
  public:
   explicit FakeTransformTransition(double duration);
   ~FakeTransformTransition() override;
 
   base::TimeDelta Duration() const override;
   gfx::Transform GetValue(base::TimeDelta time) const override;
   bool AnimatedBoundsForBox(const gfx::BoxF& box,
                             gfx::BoxF* bounds) const override;
-  bool AffectsScale() const override;
   bool IsTranslation() const override;
   bool PreservesAxisAlignment() const override;
   bool AnimationStartScale(bool forward_direction,
                            float* start_scale) const override;
   bool MaximumTargetScale(bool forward_direction,
                           float* max_scale) const override;
 
   std::unique_ptr<AnimationCurve> Clone() const override;
 
  private:
@@ skipping 112 matching lines @@
     bool use_timing_function);
 
 void AbortAnimationsOnElementWithPlayer(
     ElementId element_id,
     scoped_refptr<AnimationTimeline> timeline,
     TargetProperty::Type target_property);
 
 }  // namespace cc
 
 #endif  // CC_TEST_ANIMATION_TEST_COMMON_H_