cc: Delete unused AnimationCurve::AffectsScale and related code

cc/animation/element_animations.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_ELEMENT_ANIMATIONS_H_
 #define CC_ANIMATION_ELEMENT_ANIMATIONS_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 128 matching lines @@
   bool HasAnimationThatInflatesBounds() const {
     return HasTransformAnimationThatInflatesBounds() ||
            HasFilterAnimationThatInflatesBounds();
   }
 
   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(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
@@ skipping 107 matching lines @@
   bool needs_update_impl_client_state_transform_ : 1;
   bool needs_update_impl_client_state_opacity_ : 1;
   bool needs_update_impl_client_state_filter_ : 1;
 
   DISALLOW_COPY_AND_ASSIGN(ElementAnimations);
 };
 
 }  // namespace cc
 
 #endif  // CC_ANIMATION_ELEMENT_ANIMATIONS_H_