Add OVERRIDE to chrome/browser/.

chrome/browser/policy/asynchronous_policy_test_base.h

 // Copyright (c) 2011 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_POLICY_ASYNCHRONOUS_POLICY_TEST_BASE_H_
 #define CHROME_BROWSER_POLICY_ASYNCHRONOUS_POLICY_TEST_BASE_H_
 #pragma once
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
@@ skipping 16 matching lines @@
  private:
   DISALLOW_COPY_AND_ASSIGN(ProviderDelegateMock);
 };
 
 class AsynchronousPolicyTestBase : public testing::Test {
  public:
   AsynchronousPolicyTestBase();
   virtual ~AsynchronousPolicyTestBase();
 
   // testing::Test:
-  virtual void TearDown();
+  virtual void TearDown() OVERRIDE;
 
  protected:
   // Create an actual IO loop (needed by FilePathWatcher).
   MessageLoopForIO loop_;
 
  private:
   content::TestBrowserThread ui_thread_;
   content::TestBrowserThread file_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(AsynchronousPolicyTestBase);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_ASYNCHRONOUS_POLICY_TEST_BASE_H_