Delete "shutdown without closing browsers" path

ash/test/test_shell_delegate.cc

 // 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 "ash/test/test_shell_delegate.h"
 
 #include <limits>
 
 #include "ash/default_accessibility_delegate.h"
 #include "ash/gpu_support_stub.h"
@@ skipping 62 matching lines @@
   return multi_profiles_enabled_;
 }
 
 bool TestShellDelegate::IsRunningInForcedAppMode() const {
   return false;
 }
 
 void TestShellDelegate::PreInit() {
 }
 
-void TestShellDelegate::Shutdown() {
+void TestShellDelegate::PreShutdown() {
 }
 
 void TestShellDelegate::Exit() {
   num_exit_requests_++;
 }
 
 keyboard::KeyboardControllerProxy*
     TestShellDelegate::CreateKeyboardControllerProxy() {
   return new KeyboardControllerProxyStub();
 }
@@ skipping 56 matching lines @@
 base::string16 TestShellDelegate::GetProductName() const {
   return base::string16();
 }
 
 TestSessionStateDelegate* TestShellDelegate::test_session_state_delegate() {
   return test_session_state_delegate_;
 }
 
 }  // namespace test
 }  // namespace ash