Merge inbound to m-c. a=merge

toolkit/components/passwordmgr/LoginManagerContent.jsm

@@ -410,7 +410,7 @@ var LoginManagerContent = {
         log("Running deferred processing of onDOMInputPasswordAdded", formLike2);
         this._deferredPasswordAddedTasksByRootElement.delete(formLike2.rootElement);
         this._fetchLoginsFromParentAndFillForm(formLike2, window);
-      }, PASSWORD_INPUT_ADDED_COALESCING_THRESHOLD_MS);
+      }, PASSWORD_INPUT_ADDED_COALESCING_THRESHOLD_MS, 0);
 
       this._deferredPasswordAddedTasksByRootElement.set(formLike.rootElement, deferredTask);
     }