Standardize usage of virtual/override/final in chrome/browser/

chrome/browser/shell_integration.h

 // 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.
 
 #ifndef CHROME_BROWSER_SHELL_INTEGRATION_H_
 #define CHROME_BROWSER_SHELL_INTEGRATION_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 257 matching lines @@
 
     DISALLOW_COPY_AND_ASSIGN(DefaultWebClientWorker);
   };
 
   // Worker for checking and setting the default browser.
   class DefaultBrowserWorker : public DefaultWebClientWorker {
    public:
     explicit DefaultBrowserWorker(DefaultWebClientObserver* observer);
 
    private:
-    virtual ~DefaultBrowserWorker() {}
+    ~DefaultBrowserWorker() override {}
 
     // Check if Chrome is the default browser.
-    virtual DefaultWebClientState CheckIsDefault() override;
+    DefaultWebClientState CheckIsDefault() override;
 
     // Set Chrome as the default browser.
-    virtual bool SetAsDefault(bool interactive_permitted) override;
+    bool SetAsDefault(bool interactive_permitted) override;
 
     DISALLOW_COPY_AND_ASSIGN(DefaultBrowserWorker);
   };
 
   // Worker for checking and setting the default client application
   // for a given protocol. A different worker instance is needed for each
   // protocol you are interested in, so to check or set the default for
   // multiple protocols you should use multiple worker objects.
   class DefaultProtocolClientWorker : public DefaultWebClientWorker {
    public:
     DefaultProtocolClientWorker(DefaultWebClientObserver* observer,
                                 const std::string& protocol);
 
     const std::string& protocol() const { return protocol_; }
 
    protected:
-    virtual ~DefaultProtocolClientWorker() {}
+    ~DefaultProtocolClientWorker() override {}
 
    private:
     // Check is Chrome is the default handler for this protocol.
-    virtual DefaultWebClientState CheckIsDefault() override;
+    DefaultWebClientState CheckIsDefault() override;
 
     // Set Chrome as the default handler for this protocol.
-    virtual bool SetAsDefault(bool interactive_permitted) override;
+    bool SetAsDefault(bool interactive_permitted) override;
 
     std::string protocol_;
 
     DISALLOW_COPY_AND_ASSIGN(DefaultProtocolClientWorker);
   };
 };
 
 #endif  // CHROME_BROWSER_SHELL_INTEGRATION_H_