Standardize usage of virtual/override/final in sync/

sync/internal_api/public/attachments/attachment_service_impl.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 SYNC_INTERNAL_API_PUBLIC_ATTACHMENTS_ATTACHMENT_SERVICE_IMPL_H_
 #define SYNC_INTERNAL_API_PUBLIC_ATTACHMENTS_ATTACHMENT_SERVICE_IMPL_H_
 
 #include <deque>
 
 #include "base/memory/ref_counted.h"
@@ skipping 35 matching lines @@
   // successful upload clears the delay.
   //
   // |max_backoff_delay| the maxmium delay between upload attempts when backed
   // off.
   AttachmentServiceImpl(scoped_refptr<AttachmentStore> attachment_store,
                         scoped_ptr<AttachmentUploader> attachment_uploader,
                         scoped_ptr<AttachmentDownloader> attachment_downloader,
                         Delegate* delegate,
                         const base::TimeDelta& initial_backoff_delay,
                         const base::TimeDelta& max_backoff_delay);
-  virtual ~AttachmentServiceImpl();
+  ~AttachmentServiceImpl() override;
 
   // Create an AttachmentServiceImpl suitable for use in tests.
   static scoped_ptr<syncer::AttachmentService> CreateForTest();
 
   // AttachmentService implementation.
-  virtual AttachmentStore* GetStore() override;
-  virtual void GetOrDownloadAttachments(
-      const AttachmentIdList& attachment_ids,
-      const GetOrDownloadCallback& callback) override;
-  virtual void DropAttachments(const AttachmentIdList& attachment_ids,
-                               const DropCallback& callback) override;
-  virtual void UploadAttachments(
-      const AttachmentIdSet& attachment_ids) override;
+  AttachmentStore* GetStore() override;
+  void GetOrDownloadAttachments(const AttachmentIdList& attachment_ids,
+                                const GetOrDownloadCallback& callback) override;
+  void DropAttachments(const AttachmentIdList& attachment_ids,
+                       const DropCallback& callback) override;
+  void UploadAttachments(const AttachmentIdSet& attachment_ids) override;
 
   // NetworkChangeObserver implementation.
-  virtual void OnNetworkChanged(
+  void OnNetworkChanged(
       net::NetworkChangeNotifier::ConnectionType type) override;
 
   // Use |timer| in the underlying TaskQueue.
   //
   // Used in tests.  See also MockTimer.
   void SetTimerForTest(scoped_ptr<base::Timer> timer);
 
  private:
   class GetOrDownloadState;
 
@@ skipping 30 matching lines @@
 
   // Must be last data member.
   base::WeakPtrFactory<AttachmentServiceImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AttachmentServiceImpl);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_PUBLIC_ATTACHMENTS_ATTACHMENT_SERVICE_IMPL_H_