Move application lifetime functionality off BrowserList.

chrome/browser/ui/browser_list_mac.mm

Index: chrome/browser/ui/browser_list_mac.mm
===================================================================
--- chrome/browser/ui/browser_list_mac.mm	(revision 137868)
+++ chrome/browser/ui/browser_list_mac.mm	(working copy)
@@ -1,14 +0,0 @@
-// 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.
-
-#include "chrome/browser/ui/browser_list.h"
-
-#include "chrome/browser/browser_shutdown.h"
-#import "chrome/browser/chrome_browser_application_mac.h"
-
-// static
-void BrowserList::HandleAppExitingForPlatform() {
-  // Last browser is closed, so call back to controller to shutdown the app.
-  chrome_browser_application_mac::Terminate();
-}