Clear session-only data when all browser windows are closed.

chrome/browser/background/background_mode_manager.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_MODE_MANAGER_H_
 #define CHROME_BROWSER_BACKGROUND_BACKGROUND_MODE_MANAGER_H_
 
 #include <map>
 
 #include "base/gtest_prod_util.h"
@@ skipping 42 matching lines @@
                         ProfileInfoCache* profile_cache);
   virtual ~BackgroundModeManager();
 
   static void RegisterPrefs(PrefRegistrySimple* registry);
 
   virtual void RegisterProfile(Profile* profile);
 
   static void LaunchBackgroundApplication(Profile* profile,
       const extensions::Extension* extension);
 
+  // Returns true if background mode is active.
+  virtual bool IsBackgroundModeActive();
+
   // For testing purposes.
   int NumberOfBackgroundModeData();
 
  private:
   friend class AppBackgroundPageApiTest;
   friend class BackgroundModeManagerTest;
   friend class TestBackgroundModeManager;
   FRIEND_TEST_ALL_PREFIXES(BackgroundModeManagerTest,
                            BackgroundAppLoadUnload);
   FRIEND_TEST_ALL_PREFIXES(BackgroundModeManagerTest,
@@ skipping 166 matching lines @@
   // Returns the iterator associated with a particular profile name.
   // This should not be used to iterate over the background mode data. It is
   // used to efficiently delete an item from the background mode data map.
   BackgroundModeInfoMap::iterator GetBackgroundModeIterator(
       const string16& profile_name);
 
   // Returns true if the "Let chrome run in the background" pref is checked.
   // (virtual to allow overriding in tests).
   virtual bool IsBackgroundModePrefEnabled() const;
 
-  // Returns true if background mode is active. Used only by tests.
-  bool IsBackgroundModeActiveForTest();
-
   // Turns off background mode if it's currently enabled.
   void DisableBackgroundMode();
 
   // Turns on background mode if it's currently disabled.
   void EnableBackgroundMode();
 
   // Returns the number of background apps in the system (virtual to allow
   // overriding in unit tests).
   virtual int GetBackgroundAppCount() const;
 
@@ skipping 40 matching lines @@
   // app).
   bool keep_alive_for_test_;
 
   // Provides a command id for each profile as they are created.
   int current_command_id_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundModeManager);
 };
 
 #endif  // CHROME_BROWSER_BACKGROUND_BACKGROUND_MODE_MANAGER_H_