CC: Stop TimingFunction inheriting from AnimationCurve.

cc/trees/layer_tree_host_unittest_animation.cc

 // 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.
 
 #include "cc/trees/layer_tree_host.h"
 
 #include "cc/animation/animation_curve.h"
 #include "cc/animation/layer_animation_controller.h"
 #include "cc/animation/scroll_offset_animation_curve.h"
 #include "cc/animation/timing_function.h"
@@ skipping 679 matching lines @@
   virtual void BeginTest() OVERRIDE {
     PostSetNeedsCommitToMainThread();
   }
 
   virtual void DidCommit() OVERRIDE {
     if (layer_tree_host()->source_frame_number() == 1) {
       scoped_refptr<Layer> layer = Layer::Create();
       layer->set_layer_animation_delegate(this);
 
       // Any valid AnimationCurve will do here.
-      scoped_ptr<AnimationCurve> curve(EaseTimingFunction::Create());
+      scoped_ptr<AnimationCurve> curve(new FakeFloatAnimationCurve());
       scoped_ptr<Animation> animation(
           Animation::Create(curve.Pass(), 1, 1,
                                   Animation::Opacity));
       layer->layer_animation_controller()->AddAnimation(animation.Pass());
 
       // We add the animation *before* attaching the layer to the tree.
       layer_tree_host()->root_layer()->AddChild(layer);
     }
   }
 
@@ skipping 573 matching lines @@
  private:
   scoped_refptr<Layer> content_;
   int num_swap_buffers_;
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(
     LayerTreeHostAnimationTestAddAnimationAfterAnimating);
 
 }  // namespace
 }  // namespace cc