Not for review - Rebase of crrev.com/62833003

Source/platform/graphics/GraphicsLayer.h

Index: Source/platform/graphics/GraphicsLayer.h
diff --git a/Source/platform/graphics/GraphicsLayer.h b/Source/platform/graphics/GraphicsLayer.h
index 30a3c7abc23d8ec1862767f5ba3e43e029f784dd..917d71d660c5e6c01396b33ef239dad6cd42c4d8 100644
--- a/Source/platform/graphics/GraphicsLayer.h
+++ b/Source/platform/graphics/GraphicsLayer.h
@@ -190,6 +190,13 @@ public:
     // Set that the position/size of the contents (image or video).
     void setContentsRect(const IntRect&);
 
+    // If this layer may be affected by a worker animation, then it must have
+    // the property registered via this call.
+    void addAnimatedProperty(const String&);
+
+    // Clears any properties added via |addAnimatedProperty|.
+    void clearAnimatedProperties();
+
     // Return true if the animation is handled by the compositing system. If this returns
     // false, the animation will be run by AnimationController.
     // These methods handle both transitions and keyframe animations.