Ref count layer animation controllers.

cc/layer_impl.cc

Index: cc/layer_impl.cc
diff --git a/cc/layer_impl.cc b/cc/layer_impl.cc
index e1cf9d49fd8695871fa11f6bc3ce5511864c715a..7f6bdb4dc55789f4500076c91d7955c803d60d6b 100644
--- a/cc/layer_impl.cc
+++ b/cc/layer_impl.cc
@@ -50,11 +50,13 @@ LayerImpl::LayerImpl(LayerTreeImpl* treeImpl, int id)
 #ifndef NDEBUG
     , m_betweenWillDrawAndDidDraw(false)
 #endif
-    , m_layerAnimationController(LayerAnimationController::create(this))
 {
     DCHECK(m_layerId > 0);
     DCHECK(m_layerTreeImpl);
     m_layerTreeImpl->RegisterLayer(this);
+    AnimationRegistrar* registrar = m_layerTreeImpl;
+    m_layerAnimationController = registrar->GetAnimationControllerForId(m_layerId);
+    m_layerAnimationController->addObserver(this);
 }
 
 LayerImpl::~LayerImpl()
@@ -63,6 +65,7 @@ LayerImpl::~LayerImpl()
     DCHECK(!m_betweenWillDrawAndDidDraw);
 #endif
     m_layerTreeImpl->UnregisterLayer(this);
+    m_layerAnimationController->removeObserver(this);
 }
 
 void LayerImpl::addChild(scoped_ptr<LayerImpl> child)
@@ -459,22 +462,12 @@ int LayerImpl::id() const
      return m_layerId;
 }
 
-float LayerImpl::opacity() const
-{
-     return m_opacity;
-}
-
-void LayerImpl::setOpacityFromAnimation(float opacity)
+void LayerImpl::OnOpacityAnimated(float opacity)
 {
     setOpacity(opacity);
 }
 
-const gfx::Transform& LayerImpl::transform() const
-{
-     return m_transform;
-}
-
-void LayerImpl::setTransformFromAnimation(const gfx::Transform& transform)
+void LayerImpl::OnTransformAnimated(const gfx::Transform& transform)
 {
     setTransform(transform);
 }
@@ -626,6 +619,11 @@ void LayerImpl::setOpacity(float opacity)
     noteLayerSurfacePropertyChanged();
 }
 
+float LayerImpl::opacity() const
+{
+    return m_opacity;
+}
+
 bool LayerImpl::opacityIsAnimating() const
 {
     return m_layerAnimationController->isAnimatingProperty(ActiveAnimation::Opacity);
@@ -668,6 +666,11 @@ void LayerImpl::setTransform(const gfx::Transform& transform)
     noteLayerSurfacePropertyChanged();
 }
 
+const gfx::Transform& LayerImpl::transform() const
+{
+    return m_transform;
+}
+
 bool LayerImpl::transformIsAnimating() const
 {
     return m_layerAnimationController->isAnimatingProperty(ActiveAnimation::Transform);