Blink Compositor Animation: Make Animation and Curve methods non-virtual.

cc/animation/timing_function.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_TIMING_FUNCTION_H_
 #define CC_ANIMATION_TIMING_FUNCTION_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 30 matching lines @@
                                                            double x2,
                                                            double y2);
   ~CubicBezierTimingFunction() override;
 
   // TimingFunction implementation.
   float GetValue(double time) const override;
   float Velocity(double time) const override;
   void Range(float* min, float* max) const override;
   std::unique_ptr<TimingFunction> Clone() const override;
 
+  EaseType ease_type() const { return ease_type_; }
+
  protected:
-  CubicBezierTimingFunction(double x1, double y1, double x2, double y2);
+  CubicBezierTimingFunction(EaseType ease_type,
+                            double x1,
+                            double y1,
+                            double x2,
+                            double y2);
 
   gfx::CubicBezier bezier_;
+  EaseType ease_type_;
 
  private:
   DISALLOW_ASSIGN(CubicBezierTimingFunction);
 };
 
 class CC_EXPORT EaseTimingFunction {
  public:
   static std::unique_ptr<TimingFunction> Create();
 
  private:
@@ skipping 46 matching lines @@
  private:
   int steps_;
   float steps_start_offset_;
 
   DISALLOW_ASSIGN(StepsTimingFunction);
 };
 
 }  // namespace cc
 
 #endif  // CC_ANIMATION_TIMING_FUNCTION_H_