Cleanup: Pull some browser keep alive functions into its own file.

chrome/browser/app_controller_mac.mm

 // 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.
 
 #import "chrome/browser/app_controller_mac.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
@@ skipping 14 matching lines @@
 #include "chrome/browser/background/background_mode_manager.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_shutdown.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/command_updater.h"
 #include "chrome/browser/download/download_service.h"
 #include "chrome/browser/download/download_service_factory.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/first_run/first_run.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
+#include "chrome/browser/lifetime/browser_keep_alive.h"
 #include "chrome/browser/mac/mac_startup_profiler.h"
 #include "chrome/browser/prefs/incognito_mode_prefs.h"
 #include "chrome/browser/profiles/profile_info_cache_observer.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/profiles/profiles_state.h"
 #include "chrome/browser/sessions/session_restore.h"
 #include "chrome/browser/sessions/session_service.h"
 #include "chrome/browser/sessions/session_service_factory.h"
 #include "chrome/browser/sessions/tab_restore_service_factory.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
@@ skipping 466 matching lines @@
       runModalLoopForApplication:app];
 }
 
 // Called when the app is shutting down. Clean-up as appropriate.
 - (void)applicationWillTerminate:(NSNotification*)aNotification {
   // There better be no browser windows left at this point.
   CHECK_EQ(0u, chrome::GetTotalBrowserCount());
 
   // Tell BrowserList not to keep the browser process alive. Once all the
   // browsers get dealloc'd, it will stop the RunLoop and fall back into main().
-  chrome::DecrementKeepAliveCount();
+  keep_alive_.reset();
 
   // Reset all pref watching, as this object outlives the prefs system.
   profilePrefRegistrar_.reset();
   localPrefRegistrar_.RemoveAll();
 
   [self unregisterEventHandlers];
 
   appShimMenuController_.reset();
 
   STLDeleteContainerPairSecondPointers(profileBookmarkMenuBridgeMap_.begin(),
@@ skipping 191 matching lines @@
 
 // This is called after profiles have been loaded and preferences registered.
 // It is safe to access the default profile here.
 - (void)applicationDidFinishLaunching:(NSNotification*)notify {
   MacStartupProfiler::GetInstance()->Profile(
       MacStartupProfiler::DID_FINISH_LAUNCHING);
   MacStartupProfiler::GetInstance()->RecordMetrics();
 
   // Notify BrowserList to keep the application running so it doesn't go away
   // when all the browser windows get closed.
-  chrome::IncrementKeepAliveCount();
+  keep_alive_.reset(new browser_lifetime::ScopedKeepAlive);
 
   [self setUpdateCheckInterval];
 
   // Start managing the menu for app windows. This needs to be done here because
   // main menu item titles are not yet initialized in awakeFromNib.
   [self initAppShimMenuController];
 
   // If enabled, keep Chrome alive when apps are open instead of quitting all
   // apps.
   quitWithAppsController_ = new QuitWithAppsController();
@@ skipping 957 matching lines @@
 
 //---------------------------------------------------------------------------
 
 namespace app_controller_mac {
 
 bool IsOpeningNewWindow() {
   return g_is_opening_new_window;
 }
 
 }  // namespace app_controller_mac