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

content/browser/devtools/devtools_protocol.h

 // Copyright (c) 2013 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_BROWSER_DEVTOOLS_DEVTOOLS_PROTOCOL_H_
 #define CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_PROTOCOL_H_
 
 #include <map>
 #include <string>
 
@@ skipping 32 matching lines @@
     scoped_ptr<base::DictionaryValue> params_;
 
    private:
     DISALLOW_COPY_AND_ASSIGN(Message);
   };
 
   class Command : public Message {
    public:
     int id() { return id_; }
 
-    virtual std::string Serialize() override;
+    std::string Serialize() override;
 
     // Creates success response. Takes ownership of |result|.
     scoped_refptr<Response> SuccessResponse(base::DictionaryValue* result);
 
     // Creates error response.
     scoped_refptr<Response> InternalErrorResponse(const std::string& message);
 
     // Creates error response.
     scoped_refptr<Response> InvalidParamResponse(const std::string& param);
 
     // Creates error response.
     scoped_refptr<Response> NoSuchMethodErrorResponse();
 
     // Creates error response.
     scoped_refptr<Response> ServerErrorResponse(const std::string& message);
 
     // Creates async response promise.
     scoped_refptr<Response> AsyncResponsePromise();
 
    protected:
-    virtual  ~Command();
+    ~Command() override;
 
    private:
     friend class DevToolsProtocol;
     Command(int id, const std::string& method,
             base::DictionaryValue* params);
 
     int id_;
 
     DISALLOW_COPY_AND_ASSIGN(Command);
   };
@@ skipping 17 matching lines @@
     scoped_ptr<base::DictionaryValue> result_;
     int error_code_;
     std::string error_message_;
     bool is_async_promise_;
 
     DISALLOW_COPY_AND_ASSIGN(Response);
   };
 
   class Notification : public Message {
    public:
-
-    virtual std::string Serialize() override;
+    std::string Serialize() override;
 
    private:
     friend class DevToolsProtocol;
-    virtual ~Notification();
+    ~Notification() override;
 
     // Takes ownership of |params|.
     Notification(const std::string& method,
                  base::DictionaryValue* params);
 
     DISALLOW_COPY_AND_ASSIGN(Notification);
   };
 
   class CONTENT_EXPORT Handler {
    public:
@@ skipping 58 matching lines @@
   static scoped_refptr<Notification> CreateNotification(
       const std::string& method, base::DictionaryValue* params);
 
   DevToolsProtocol() {}
   ~DevToolsProtocol() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_PROTOCOL_H_