Move Chrome terminating notification out of //apps

chrome/browser/apps/app_shim/extension_app_shim_handler_mac.cc

 // Copyright 2013 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.
 
 #include "chrome/browser/apps/app_shim/extension_app_shim_handler_mac.h"
 
 #include "apps/app_lifetime_monitor_factory.h"
 #include "apps/launcher.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
@@ skipping 717 matching lines @@
   if (host)
     host->OnAppClosed();
 
   if (hosts_.empty())
     delegate_->MaybeTerminate();
 }
 
 void ExtensionAppShimHandler::OnAppStop(Profile* profile,
                                         const std::string& app_id) {}
 
-void ExtensionAppShimHandler::OnChromeTerminating() {}
-
 // The BrowserWindow may be NULL when this is called.
 // Therefore we listen for the notification
 // chrome::NOTIFICATION_BROWSER_WINDOW_READY and then call OnAppActivated.
 // If this notification is removed, check that OnBrowserAdded is called after
 // the BrowserWindow is ready.
 void ExtensionAppShimHandler::OnBrowserAdded(Browser* browser) {
 }
 
 void ExtensionAppShimHandler::OnBrowserRemoved(Browser* browser) {
   const Extension* extension = MaybeGetAppForBrowser(browser);
   if (!extension)
     return;
 
   AppBrowserMap::iterator it = app_browser_windows_.find(extension->id());
   if (it != app_browser_windows_.end()) {
     BrowserSet& browsers = it->second;
     browsers.erase(browser);
     if (browsers.empty())
       OnAppDeactivated(browser->profile(), extension->id());
   }
 }
 
 }  // namespace apps