Standardize usage of virtual/override/final in extensions/

extensions/common/api/sockets/sockets_manifest_data.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 EXTENSIONS_COMMON_API_SOCKETS_SOCKETS_MANIFEST_DATA_H_
 #define EXTENSIONS_COMMON_API_SOCKETS_SOCKETS_MANIFEST_DATA_H_
 
 #include <vector>
 
 #include "base/strings/string16.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/manifest_handler.h"
 
 namespace content {
 struct SocketPermissionRequest;
 }
 
 namespace extensions {
 class SocketsManifestPermission;
 }
 
 namespace extensions {
 
 // The parsed form of the "sockets" manifest entry.
 class SocketsManifestData : public Extension::ManifestData {
  public:
   explicit SocketsManifestData(
       scoped_ptr<SocketsManifestPermission> permission);
-  virtual ~SocketsManifestData();
+  ~SocketsManifestData() override;
 
   // Gets the SocketsManifestData for |extension|, or NULL if none was
   // specified.
   static SocketsManifestData* Get(const Extension* extension);
 
   static bool CheckRequest(const Extension* extension,
                            const content::SocketPermissionRequest& request);
 
   // Tries to construct the info based on |value|, as it would have appeared in
   // the manifest. Sets |error| and returns an empty scoped_ptr on failure.
   static scoped_ptr<SocketsManifestData> FromValue(const base::Value& value,
                                                    base::string16* error);
 
   const SocketsManifestPermission* permission() const {
     return permission_.get();
   }
 
  private:
   scoped_ptr<SocketsManifestPermission> permission_;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_API_SOCKETS_SOCKETS_MANIFEST_DATA_H_