No longer start BG mode until a BackgroundContents is loaded

chrome/common/chrome_notification_types.h

 // 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.
 
 #ifndef CHROME_COMMON_CHROME_NOTIFICATION_TYPES_H_
 #define CHROME_COMMON_CHROME_NOTIFICATION_TYPES_H_
 #pragma once
 
 #include "content/public/browser/notification_types.h"
 
@@ skipping 182 matching lines @@
   NOTIFICATION_BACKGROUND_CONTENTS_CLOSED,
 
   // The background contents is being deleted. The source is the
   // parent Profile, and the details are the BackgroundContents being deleted.
   NOTIFICATION_BACKGROUND_CONTENTS_DELETED,
 
   // The background contents has crashed. The source is the parent Profile,
   // and the details are the BackgroundContents.
   NOTIFICATION_BACKGROUND_CONTENTS_TERMINATED,
 
+  // The background contents associated with a hosted app has changed (either
+  // a new background contents has been created, or an existing background
+  // contents has closed). The source is the parent Profile, and the details
+  // are the BackgroundContentsService.
+  NOTIFICATION_BACKGROUND_CONTENTS_SERVICE_CHANGED,
+
+  // Chrome has entered/exited background mode. The source is the
+  // BackgroundModeManager and the details are a boolean value which is set to
+  // true if Chrome is now in background mode.
+  NOTIFICATION_BACKGROUND_MODE_CHANGED,
+
   // This is sent when a login prompt is shown.  The source is the
   // Source<NavigationController> for the tab in which the prompt is shown.
   // Details are a LoginNotificationDetails which provide the LoginHandler
   // that should be given authentication.
   NOTIFICATION_AUTH_NEEDED,
 
   // This is sent when authentication credentials have been supplied (either
   // by the user or by an automation service), but before we've actually
   // received another response from the server.  The source is the
   // Source<NavigationController> for the tab in which the prompt was shown.
@@ skipping 873 matching lines @@
   // Currently only Content and Chrome define and use notifications.
   // Custom notifications not belonging to Content and Chrome should start
   // from here.
   NOTIFICATION_CHROME_END,
 };
 
 }  // namespace chrome
 
 
 #endif  // CHROME_COMMON_CHROME_NOTIFICATION_TYPES_H_