No longer start BG mode until a BackgroundContents is loaded

chrome/test/data/extensions/api_test/app_background_page/common/common.js

Index: chrome/test/data/extensions/api_test/app_background_page/common/common.js
diff --git a/chrome/test/data/extensions/api_test/app_background_page/common/common.js b/chrome/test/data/extensions/api_test/app_background_page/common/common.js
index b3d3458d371c6b93dd54705a910112aa68476441..987e746baf97637101f79b4c4e793715debbe5da 100644
--- a/chrome/test/data/extensions/api_test/app_background_page/common/common.js
+++ b/chrome/test/data/extensions/api_test/app_background_page/common/common.js
@@ -1,3 +1,6 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
 var scriptMessageEvent;
 var pageToScriptTunnel;
 var scriptToPageTunnel;
@@ -54,3 +57,8 @@ function notifyBackgroundPageClosing() {
   pageToScriptTunnel.innerText = JSON.stringify(messageData(arguments));
   pageToScriptTunnel.dispatchEvent(scriptMessageEvent);
 }
+
+function notifyBackgroundPageClosed() {
+  pageToScriptTunnel.innerText = JSON.stringify(messageData(arguments));
+  pageToScriptTunnel.dispatchEvent(scriptMessageEvent);
+}