Standardize usage of virtual/override/final in media/

media/blink/new_session_cdm_result_promise.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 MEDIA_BLINK_NEW_SESSION_CDM_RESULT_PROMISE_H_
 #define MEDIA_BLINK_NEW_SESSION_CDM_RESULT_PROMISE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 11 matching lines @@
 // promise returns the session ID (as a string), but the blink promise needs
 // to get passed a SessionStatus. This class converts the session id to a
 // SessionStatus by calling |new_session_created_cb|.
 class MEDIA_EXPORT NewSessionCdmResultPromise
     : public CdmPromiseTemplate<std::string> {
  public:
   NewSessionCdmResultPromise(
       const blink::WebContentDecryptionModuleResult& result,
       const std::string& uma_name,
       const SessionInitializedCB& new_session_created_cb);
-  virtual ~NewSessionCdmResultPromise();
+  ~NewSessionCdmResultPromise() override;
 
   // CdmPromiseTemplate<T> implementation.
-  virtual void resolve(const std::string& web_session_id) override;
-  virtual void reject(MediaKeys::Exception exception_code,
-                      uint32 system_code,
-                      const std::string& error_message) override;
+  void resolve(const std::string& web_session_id) override;
+  void reject(MediaKeys::Exception exception_code,
+              uint32 system_code,
+              const std::string& error_message) override;
 
  private:
   blink::WebContentDecryptionModuleResult web_cdm_result_;
 
   // UMA name to report result to.
   std::string uma_name_;
 
   // Called on resolve() to convert the session ID into a SessionStatus to
   // be reported to blink.
   SessionInitializedCB new_session_created_cb_;
 
   DISALLOW_COPY_AND_ASSIGN(NewSessionCdmResultPromise);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_NEW_SESSION_CDM_RESULT_PROMISE_H_