CC Animations: Make ui::LayerAnimator a LayerAnimationEventObserver (instead of ui::Layer)

ui/compositor/test/test_layer_animation_delegate.cc

Index: ui/compositor/test/test_layer_animation_delegate.cc
diff --git a/ui/compositor/test/test_layer_animation_delegate.cc b/ui/compositor/test/test_layer_animation_delegate.cc
index e6053d6765d04c90f5fa4a36023978500ae18610..140e81eaec53fb49758456371f3db2d505c5095d 100644
--- a/ui/compositor/test/test_layer_animation_delegate.cc
+++ b/ui/compositor/test/test_layer_animation_delegate.cc
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "ui/compositor/layer.h"
 #include "ui/compositor/test/test_layer_animation_delegate.h"
 
 namespace ui {
@@ -12,6 +13,7 @@ TestLayerAnimationDelegate::TestLayerAnimationDelegate()
       brightness_(0.0f),
       grayscale_(0.0f),
       color_(SK_ColorBLACK) {
+  CreateCcLayer();
 }
 
 TestLayerAnimationDelegate::TestLayerAnimationDelegate(
@@ -21,6 +23,7 @@ TestLayerAnimationDelegate::TestLayerAnimationDelegate(
       opacity_(other.GetOpacityForAnimation()),
       visibility_(other.GetVisibilityForAnimation()),
       color_(SK_ColorBLACK) {
+  CreateCcLayer();
 }
 
 TestLayerAnimationDelegate::~TestLayerAnimationDelegate() {
@@ -103,4 +106,12 @@ TestLayerAnimationDelegate::GetLayerAnimatorCollection() {
   return NULL;
 }
 
+cc::Layer* TestLayerAnimationDelegate::GetCcLayer() const {
+  return cc_layer_.get();
+}
+
+void TestLayerAnimationDelegate::CreateCcLayer() {
+  cc_layer_ = cc::Layer::Create(ui::Layer::UILayerSettings());
+}
+
 }  // namespace ui