Update {virtual,override,final} to follow C++11 style.

media/base/android/media_drm_bridge.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 MEDIA_BASE_ANDROID_MEDIA_DRM_BRIDGE_H_
 #define MEDIA_BASE_ANDROID_MEDIA_DRM_BRIDGE_H_
 
 #include <jni.h>
 #include <string>
 #include <vector>
@@ skipping 17 matching lines @@
 class MEDIA_EXPORT MediaDrmBridge : public BrowserCdm {
  public:
   enum SecurityLevel {
     SECURITY_LEVEL_NONE = 0,
     SECURITY_LEVEL_1 = 1,
     SECURITY_LEVEL_3 = 3,
   };
 
   typedef base::Callback<void(bool)> ResetCredentialsCB;
 
-  virtual ~MediaDrmBridge();
+  ~MediaDrmBridge() override;
 
   // Checks whether MediaDRM is available.
   // All other static methods check IsAvailable() internally. There's no need
   // to check IsAvailable() explicitly before calling them.
   static bool IsAvailable();
 
   static bool IsSecurityLevelSupported(const std::string& key_system,
                                        SecurityLevel security_level);
 
   // Checks whether |key_system| is supported.
@@ skipping 164 matching lines @@
   PlayerTrackerImpl player_tracker_;
 
   CdmPromiseAdapter cdm_promise_adapter_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaDrmBridge);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_MEDIA_DRM_BRIDGE_H_