Standardize usage of virtual/override/final in net/

net/quic/crypto/channel_id_chromium.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 NET_QUIC_CRYPTO_CHANNEL_ID_CHROMIUM_H_
 #define NET_QUIC_CRYPTO_CHANNEL_ID_CHROMIUM_H_
 
 #include <set>
 
 #include "net/quic/crypto/channel_id.h"
 
 namespace crypto {
 class ECPrivateKey;
 }  // namespace crypto
 
 namespace net {
 
 class ChannelIDService;
 
 class NET_EXPORT_PRIVATE ChannelIDKeyChromium: public ChannelIDKey {
  public:
   explicit ChannelIDKeyChromium(crypto::ECPrivateKey* ec_private_key);
-  virtual ~ChannelIDKeyChromium();
+  ~ChannelIDKeyChromium() override;
 
   // ChannelIDKey interface
-  virtual bool Sign(base::StringPiece signed_data,
-                    std::string* out_signature) const override;
-  virtual std::string SerializeKey() const override;
+  bool Sign(base::StringPiece signed_data,
+            std::string* out_signature) const override;
+  std::string SerializeKey() const override;
 
  private:
   scoped_ptr<crypto::ECPrivateKey> ec_private_key_;
 };
 
 // ChannelIDSourceChromium implements the QUIC ChannelIDSource interface.
 class ChannelIDSourceChromium : public ChannelIDSource {
  public:
   explicit ChannelIDSourceChromium(
       ChannelIDService* channel_id_service);
-  virtual ~ChannelIDSourceChromium();
+  ~ChannelIDSourceChromium() override;
 
   // ChannelIDSource interface
-  virtual QuicAsyncStatus GetChannelIDKey(
-      const std::string& hostname,
-      scoped_ptr<ChannelIDKey>* channel_id_key,
-      ChannelIDSourceCallback* callback) override;
+  QuicAsyncStatus GetChannelIDKey(const std::string& hostname,
+                                  scoped_ptr<ChannelIDKey>* channel_id_key,
+                                  ChannelIDSourceCallback* callback) override;
 
  private:
   class Job;
   typedef std::set<Job*> JobSet;
 
   void OnJobComplete(Job* job);
 
   // Set owning pointers to active jobs.
   JobSet active_jobs_;
 
   // The service for retrieving Channel ID keys.
   ChannelIDService* const channel_id_service_;
 
   DISALLOW_COPY_AND_ASSIGN(ChannelIDSourceChromium);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CRYPTO_CHANNEL_ID_CHROMIUM_H_