Fix ASSERTS in worker code in OSX....

third_party/WebKit/WebCore/bindings/v8/V8DOMMap.h

Index: third_party/WebKit/WebCore/bindings/v8/V8DOMMap.h
===================================================================
--- third_party/WebKit/WebCore/bindings/v8/V8DOMMap.h	(revision 13509)
+++ third_party/WebKit/WebCore/bindings/v8/V8DOMMap.h	(working copy)
@@ -53,6 +53,9 @@
     // A map from a DOM object to its JS wrapper for DOM objects which can have pending activity.
     DOMWrapperMap<void>& getActiveDOMObjectMap();
 
+    // This should be called to remove all DOM objects associated with the current thread when it is tearing down.
+    void removeAllDOMObjectsInCurrentThread();
+
 #if ENABLE(SVG)
     // A map for SVGElementInstances to its JS wrapper.
     DOMWrapperMap<SVGElementInstance>& getDOMSVGElementInstanceMap();