Fix --enable-functiontimer build, bug 690943.

dom/base/nsJSEnvironment.cpp

@@ -1873,8 +1873,8 @@ nsJSContext::CallEventHandler(nsISupports* aTarget, void *aScope, void *aHandler
 #ifdef NS_FUNCTION_TIMER
   {
     JSObject *obj = static_cast<JSObject *>(aHandler);
-    if (obj->isFunctionProxy())
-      obj = obj->unwrap(NULL);
+    if (js::IsFunctionProxy(obj))
+      obj = js::UnwrapObject(obj);
     JSString *id = JS_GetFunctionId(static_cast<JSFunction *>(JS_GetPrivate(mContext, obj)));
     JSAutoByteString bytes;
     const char *name = !id ? "anonymous" : bytes.encode(mContext, id) ? bytes.ptr() : "<error>";