Expose Web Animations API to Web Workers

Source/core/frame/LocalDOMWindow.h

Index: Source/core/frame/LocalDOMWindow.h
diff --git a/Source/core/frame/LocalDOMWindow.h b/Source/core/frame/LocalDOMWindow.h
index 1521dd7dc88d76c3b27674806db5e101c086f78e..03bbb68bee9905b7523d33d41c00fb055d685430 100644
--- a/Source/core/frame/LocalDOMWindow.h
+++ b/Source/core/frame/LocalDOMWindow.h
@@ -31,11 +31,11 @@
 #include "core/events/EventTarget.h"
 #include "core/frame/DOMWindowBase64.h"
 #include "core/frame/FrameDestructionObserver.h"
+#include "core/workers/Worker.h"
 #include "platform/LifecycleContext.h"
 #include "platform/Supplementable.h"
 #include "platform/heap/Handle.h"
 #include "platform/scroll/ScrollableArea.h"
-
 #include "wtf/Forward.h"
 
 namespace blink {
@@ -103,6 +103,8 @@ enum PageshowEventPersistence {
         }
         virtual ~LocalDOMWindow();
 
+        PassRefPtr<Worker> createAnimationWorker(ExecutionContext*, const String& url, ExceptionState &);
+
         PassRefPtrWillBeRawPtr<Document> installNewDocument(const String& mimeType, const DocumentInit&, bool forceXHTML = false);
 
         virtual const AtomicString& interfaceName() const OVERRIDE;