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 df861ab42c9374debbbb3dc1fdb3eef2367b3741..c0dc6224a5871d547e17b4526515cc16a44dc2e0 100644
--- a/Source/web/WebFrameWidgetImpl.cpp
+++ b/Source/web/WebFrameWidgetImpl.cpp
@@ -1014,4 +1014,10 @@ void WebFrameWidgetImpl::setRootGraphicsLayer(GraphicsLayer* layer)
     suppressInvalidations(false);
 }
 
+void WebFrameWidgetImpl::setCompositorAnimationTimeline(WebCompositorAnimationTimeline* compositorTimeline)
+{
+    if (m_layerTreeView)
+        m_layerTreeView->setCompositorAnimationTimeline(compositorTimeline);
+}
+
 } // namespace blink