No longer start BG mode until a BackgroundContents is loaded

chrome/browser/background/background_contents_service.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_BROWSER_BACKGROUND_BACKGROUND_CONTENTS_SERVICE_H_
 #define CHROME_BROWSER_BACKGROUND_BACKGROUND_CONTENTS_SERVICE_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 35 matching lines @@
                                   public BackgroundContents::Delegate,
                                   public ProfileKeyedService {
  public:
   BackgroundContentsService(Profile* profile, const CommandLine* command_line);
   virtual ~BackgroundContentsService();
 
   // Returns the BackgroundContents associated with the passed application id,
   // or NULL if none.
   BackgroundContents* GetAppBackgroundContents(const string16& appid);
 
+  // Returns true if there's a registered BackgroundContents for this app. It
+  // is possible for this routine to return true when GetAppBackgroundContents()
+  // returns false, if the BackgroundContents closed due to the render process
+  // crashing.
+  bool HasRegisteredBackgroundContents(const string16& appid);
+
   // Returns all currently opened BackgroundContents (used by the task manager).
   std::vector<BackgroundContents*> GetBackgroundContents() const;
 
   // BackgroundContents::Delegate implementation.
   virtual void AddWebContents(content::WebContents* new_contents,
                               WindowOpenDisposition disposition,
                               const gfx::Rect& initial_pos,
                               bool user_gesture) OVERRIDE;
 
   // Gets the parent application id for the passed BackgroundContents. Returns
@@ skipping 79 matching lines @@
   // Stops loading the passed BackgroundContents on startup.
   void UnregisterBackgroundContents(BackgroundContents* contents);
 
   // Unregisters and deletes the BackgroundContents associated with the
   // passed extension.
   void ShutdownAssociatedBackgroundContents(const string16& appid);
 
   // Returns true if this BackgroundContents is in the contents_list_.
   bool IsTracked(BackgroundContents* contents) const;
 
+  // Sends out a notification when our association of background contents with
+  // apps may have changed (used by BackgroundApplicationListModel to update the
+  // set of background apps as new background contents are opened/closed).
+  void SendChangeNotification(Profile* profile);
+
   // PrefService used to store list of background pages (or NULL if this is
   // running under an incognito profile).
   PrefService* prefs_;
   content::NotificationRegistrar registrar_;
 
   // Information we track about each BackgroundContents.
   struct BackgroundContentsInfo {
     // The BackgroundContents whose information we are tracking.
     BackgroundContents* contents;
     // The name of the top level frame for this BackgroundContents.
     string16 frame_name;
   };
 
   // Map associating currently loaded BackgroundContents with their parent
   // applications.
   // Key: application id
   // Value: BackgroundContentsInfo for the BC associated with that application
   typedef std::map<string16, BackgroundContentsInfo> BackgroundContentsMap;
   BackgroundContentsMap contents_map_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundContentsService);
 };
 
 #endif  // CHROME_BROWSER_BACKGROUND_BACKGROUND_CONTENTS_SERVICE_H_