Animations: Introduce compositor AnimationPlayer and AnimationTimeline.

Source/web/WebFrameWidgetImpl.cpp

Index: Source/web/WebFrameWidgetImpl.cpp
diff --git a/Source/web/WebFrameWidgetImpl.cpp b/Source/web/WebFrameWidgetImpl.cpp
index a1d576f58a58ff3f713748b6f09daa7545c507ea..e67b77c11fbe5e3776bd4eabbead439804a8ad48 100644
--- a/Source/web/WebFrameWidgetImpl.cpp
+++ b/Source/web/WebFrameWidgetImpl.cpp
@@ -1025,6 +1025,19 @@ void WebFrameWidgetImpl::setRootGraphicsLayer(GraphicsLayer* layer)
     suppressInvalidations(false);
 }
 
+void WebFrameWidgetImpl::attachCompositorAnimationTimeline(WebCompositorAnimationTimeline* compositorTimeline)
+{
+    if (m_layerTreeView)
+        m_layerTreeView->attachCompositorAnimationTimeline(compositorTimeline);
+
+}
+
+void WebFrameWidgetImpl::detachCompositorAnimationTimeline(WebCompositorAnimationTimeline* compositorTimeline)
+{
+    if (m_layerTreeView)
+        m_layerTreeView->detachCompositorAnimationTimeline(compositorTimeline);
+}
+
 void WebFrameWidgetImpl::setVisibilityState(WebPageVisibilityState visibilityState, bool isInitialState)
 {
     if (!m_page)