Mac: reform our shutdown routine.

chrome/browser/app_controller_mac.h

 // Copyright (c) 2009 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_APP_CONTROLLER_MAC_H_
 #define CHROME_BROWSER_APP_CONTROLLER_MAC_H_
 
 #import <Cocoa/Cocoa.h>
 #include <vector>
 
@@ skipping 38 matching lines @@
   // Outlet for the help menu so we can bless it so Cocoa adds the search item
   // to it.
   IBOutlet NSMenu* helpMenu_;
 }
 
 @property(readonly, nonatomic) BOOL startupComplete;
 
 - (void)didEndMainMessageLoop;
 - (Profile*)defaultProfile;
 
+// Try to close all browser windows, and if that succeeds then quit.
+- (BOOL)tryToTerminateApplication:(NSApplication*)app;
+
+// Stop trying to terminate the application. That is, prevent the final browser
+// window closure from causing the application to quit.
+- (void)stopTryingToTerminateApplication:(NSApplication*)app;
+
 // Show the preferences window, or bring it to the front if it's already
 // visible.
 - (IBAction)showPreferences:(id)sender;
 
 // Redirect in the menu item from the expected target of "File's
 // Owner" (NSAppliation) for a Branded About Box
 - (IBAction)orderFrontStandardAboutPanel:(id)sender;
 
 // Delegate method to return the dock menu.
 - (NSMenu*)applicationDockMenu:(NSApplication*)sender;
 
 // Get the URLs that Launch Services expects the browser to open at startup.
 - (const std::vector<GURL>&)startupUrls;
 
 // Clear the list of startup URLs.
 - (void)clearStartupUrls;
 
 @end
 
 #endif