Revert 171714 - Use an auxiliary list of animation controllers.

cc/test/animation_test_common.h

Index: cc/test/animation_test_common.h
diff --git a/cc/test/animation_test_common.h b/cc/test/animation_test_common.h
index a45e9f0271262c701396ce86ecc4ff5c1991b9a5..6ee0cdd87ddb4c4b90239e178af29f8ce533fa1b 100644
--- a/cc/test/animation_test_common.h
+++ b/cc/test/animation_test_common.h
@@ -60,6 +60,23 @@ private:
     float m_to;
 };
 
+class FakeLayerAnimationControllerClient : public cc::LayerAnimationControllerClient {
+public:
+    FakeLayerAnimationControllerClient();
+    virtual ~FakeLayerAnimationControllerClient();
+
+    // LayerAnimationControllerClient implementation
+    virtual int id() const OVERRIDE;
+    virtual void setOpacityFromAnimation(float) OVERRIDE;
+    virtual float opacity() const OVERRIDE;
+    virtual void setTransformFromAnimation(const gfx::Transform&) OVERRIDE;
+    virtual const gfx::Transform& transform() const OVERRIDE;
+
+private:
+    float m_opacity;
+    gfx::Transform m_transform;
+};
+
 int addOpacityTransitionToController(cc::LayerAnimationController&, double duration, float startOpacity, float endOpacity, bool useTimingFunction);
 int addAnimatedTransformToController(cc::LayerAnimationController&, double duration, int deltaX, int deltaY);