cc: Delete unused AnimationCurve::AffectsScale and related code

cc/animation/transform_operations.h

 // Copyright 2013 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_TRANSFORM_OPERATIONS_H_
 #define CC_ANIMATION_TRANSFORM_OPERATIONS_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 41 matching lines @@
   // Sets |bounds| be the bounding box for the region within which |box| will
   // exist when it is transformed by the result of calling Blend on |from| and
   // with progress in the range [min_progress, max_progress]. If this region
   // cannot be computed, returns false.
   bool BlendedBoundsForBox(const gfx::BoxF& box,
                            const TransformOperations& from,
                            SkMScalar min_progress,
                            SkMScalar max_progress,
                            gfx::BoxF* bounds) const;
 
-  // Returns true if these operations affect scale.
-  bool AffectsScale() const;
-
   // Returns true if these operations are only translations.
   bool IsTranslation() const;
 
   // Returns false if the operations affect 2d axis alignment.
   bool PreservesAxisAlignment() const;
 
   // Returns true if this operation and its descendants have the same types
   // as other and its descendants.
   bool MatchesTypes(const TransformOperations& other) const;
 
@@ skipping 35 matching lines @@
   // For efficiency, we cache the decomposed transform.
   mutable std::unique_ptr<gfx::DecomposedTransform> decomposed_transform_;
   mutable bool decomposed_transform_dirty_;
 
   DISALLOW_ASSIGN(TransformOperations);
 };
 
 }  // namespace cc
 
 #endif  // CC_ANIMATION_TRANSFORM_OPERATIONS_H_