Standardize usage of virtual/override/final in content/

content/shell/browser/layout_test/layout_test_browser_context.h

 // Copyright 2014 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 CONTENT_SHELL_BROWSER_LAYOUT_TEST_BROWSER_CONTEXT_H_
 #define CONTENT_SHELL_BROWSER_LAYOUT_TEST_BROWSER_CONTEXT_H_
 
 #include "base/compiler_specific.h"
 #include "content/shell/browser/shell_browser_context.h"
 
 namespace net {
 class NetLog;
 }
 
 namespace content {
 
 class DownloadManagerDelegate;
 
 class LayoutTestBrowserContext : public ShellBrowserContext {
  public:
   LayoutTestBrowserContext(bool off_the_record, net::NetLog* net_log);
-  virtual ~LayoutTestBrowserContext();
+  ~LayoutTestBrowserContext() override;
 
   // BrowserContext implementation.
-  virtual DownloadManagerDelegate* GetDownloadManagerDelegate() override;
+  DownloadManagerDelegate* GetDownloadManagerDelegate() override;
 
  protected:
-  virtual ShellURLRequestContextGetter* CreateURLRequestContextGetter(
+  ShellURLRequestContextGetter* CreateURLRequestContextGetter(
       ProtocolHandlerMap* protocol_handlers,
       URLRequestInterceptorScopedVector request_interceptors) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(LayoutTestBrowserContext);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_BROWSER_LAYOUT_TEST_BROWSER_CONTEXT_H_