CC: Stop TimingFunction inheriting from AnimationCurve.

cc/trees/layer_tree_host_unittest_animation.cc

Index: cc/trees/layer_tree_host_unittest_animation.cc
diff --git a/cc/trees/layer_tree_host_unittest_animation.cc b/cc/trees/layer_tree_host_unittest_animation.cc
index fff628b1cb352c4fa098aad77114422b27216568..e9151d2eb495499cc39c4579fdbb6636fc67b7a0 100644
--- a/cc/trees/layer_tree_host_unittest_animation.cc
+++ b/cc/trees/layer_tree_host_unittest_animation.cc
@@ -5,6 +5,7 @@
 #include "cc/trees/layer_tree_host.h"
 
 #include "cc/animation/animation_curve.h"
+#include "cc/animation/keyframed_animation_curve.h"
 #include "cc/animation/layer_animation_controller.h"
 #include "cc/animation/scroll_offset_animation_curve.h"
 #include "cc/animation/timing_function.h"
@@ -697,7 +698,7 @@ class LayerTreeHostAnimationTestLayerAddedWithAnimation
       layer->set_layer_animation_delegate(this);
 
       // Any valid AnimationCurve will do here.
-      scoped_ptr<AnimationCurve> curve(EaseTimingFunction::Create());
+      scoped_ptr<AnimationCurve> curve(KeyframedFloatAnimationCurve::Create());
       scoped_ptr<Animation> animation(
           Animation::Create(curve.Pass(), 1, 1,
                                   Animation::Opacity));