cc: Delete unused AnimationCurve::AffectsScale and related code

cc/animation/animation_player.h

 // Copyright 2015 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_PLAYER_H_
 #define CC_ANIMATION_ANIMATION_PLAYER_H_
 
 #include <bitset>
 #include <vector>
 
@@ skipping 101 matching lines @@
   // are deleted.
   void ActivateAnimations(bool* changed_transform_animation,
                           bool* changed_opacity_animation,
                           bool* changed_filter_animation);
 
   bool HasFilterAnimationThatInflatesBounds() const;
   bool HasTransformAnimationThatInflatesBounds() const;
 
   bool TransformAnimationBoundsForBox(const gfx::BoxF& box,
                                       gfx::BoxF* bounds) const;
-  bool HasAnimationThatAffectsScale() const;
   bool HasOnlyTranslationTransforms(ElementListType list_type) const;
   bool AnimationsPreserveAxisAlignment() const;
 
   // Sets |start_scale| to the maximum of starting animation scale along any
   // dimension at any destination in active animations. Returns false if the
   // starting scale cannot be computed.
   bool AnimationStartScale(ElementListType list_type, float* start_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
@@ skipping 66 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(AnimationPlayer);
 };
 
 }  // namespace cc
 
 #endif  // CC_ANIMATION_ANIMATION_PLAYER_H_