Transform animations should not collapse by default when interpolating

cc/animation/keyframed_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_KEYFRAMED_ANIMATION_CURVE_H_
 #define CC_ANIMATION_KEYFRAMED_ANIMATION_CURVE_H_
 
 #include <vector>
 
 #include "base/macros.h"
@@ skipping 219 matching lines @@
   double scaled_duration() const { return scaled_duration_; }
   void set_scaled_duration(double scaled_duration) {
     scaled_duration_ = scaled_duration;
   }
 
   // AnimationCurve implementation
   base::TimeDelta Duration() const override;
   std::unique_ptr<AnimationCurve> Clone() const override;
 
   // TransformAnimationCurve implementation
-  gfx::Transform GetValue(base::TimeDelta t) const override;
+  TransformOperations GetValue(base::TimeDelta t) const override;
   bool AnimatedBoundsForBox(const gfx::BoxF& box,
                             gfx::BoxF* bounds) const override;
   bool PreservesAxisAlignment() const override;
   bool IsTranslation() const override;
   bool AnimationStartScale(bool forward_direction,
                            float* start_scale) const override;
   bool MaximumTargetScale(bool forward_direction,
                           float* max_scale) const override;
 
  private:
@@ skipping 77 matching lines @@
   std::vector<std::unique_ptr<SizeKeyframe>> keyframes_;
   std::unique_ptr<TimingFunction> timing_function_;
   double scaled_duration_;
 
   DISALLOW_COPY_AND_ASSIGN(KeyframedSizeAnimationCurve);
 };
 
 }  // namespace cc
 
 #endif  // CC_ANIMATION_KEYFRAMED_ANIMATION_CURVE_H_