Standardize usage of virtual/override/final in storage/

storage/browser/fileapi/sandbox_file_system_backend.h

Index: storage/browser/fileapi/sandbox_file_system_backend.h
diff --git a/storage/browser/fileapi/sandbox_file_system_backend.h b/storage/browser/fileapi/sandbox_file_system_backend.h
index 71e0b8bc889c1dd30d14d608fb9ad41dfaac856d..e187f9bae23d9d5a4dd574353f4c31594c57c32f 100644
--- a/storage/browser/fileapi/sandbox_file_system_backend.h
+++ b/storage/browser/fileapi/sandbox_file_system_backend.h
@@ -29,42 +29,42 @@ class STORAGE_EXPORT SandboxFileSystemBackend
     : public FileSystemBackend {
  public:
   explicit SandboxFileSystemBackend(SandboxFileSystemBackendDelegate* delegate);
-  virtual ~SandboxFileSystemBackend();
+  ~SandboxFileSystemBackend() override;
 
   // FileSystemBackend overrides.
-  virtual bool CanHandleType(FileSystemType type) const override;
-  virtual void Initialize(FileSystemContext* context) override;
-  virtual void ResolveURL(const FileSystemURL& url,
-                          OpenFileSystemMode mode,
-                          const OpenFileSystemCallback& callback) override;
-  virtual AsyncFileUtil* GetAsyncFileUtil(FileSystemType type) override;
-  virtual WatcherManager* GetWatcherManager(FileSystemType type) override;
-  virtual CopyOrMoveFileValidatorFactory* GetCopyOrMoveFileValidatorFactory(
+  bool CanHandleType(FileSystemType type) const override;
+  void Initialize(FileSystemContext* context) override;
+  void ResolveURL(const FileSystemURL& url,
+                  OpenFileSystemMode mode,
+                  const OpenFileSystemCallback& callback) override;
+  AsyncFileUtil* GetAsyncFileUtil(FileSystemType type) override;
+  WatcherManager* GetWatcherManager(FileSystemType type) override;
+  CopyOrMoveFileValidatorFactory* GetCopyOrMoveFileValidatorFactory(
       FileSystemType type,
       base::File::Error* error_code) override;
-  virtual FileSystemOperation* CreateFileSystemOperation(
+  FileSystemOperation* CreateFileSystemOperation(
       const FileSystemURL& url,
       FileSystemContext* context,
       base::File::Error* error_code) const override;
-  virtual bool SupportsStreaming(const FileSystemURL& url) const override;
-  virtual bool HasInplaceCopyImplementation(
+  bool SupportsStreaming(const FileSystemURL& url) const override;
+  bool HasInplaceCopyImplementation(
       storage::FileSystemType type) const override;
-  virtual scoped_ptr<storage::FileStreamReader> CreateFileStreamReader(
+  scoped_ptr<storage::FileStreamReader> CreateFileStreamReader(
       const FileSystemURL& url,
       int64 offset,
       int64 max_bytes_to_read,
       const base::Time& expected_modification_time,
       FileSystemContext* context) const override;
-  virtual scoped_ptr<FileStreamWriter> CreateFileStreamWriter(
+  scoped_ptr<FileStreamWriter> CreateFileStreamWriter(
       const FileSystemURL& url,
       int64 offset,
       FileSystemContext* context) const override;
-  virtual FileSystemQuotaUtil* GetQuotaUtil() override;
-  virtual const UpdateObserverList* GetUpdateObservers(
+  FileSystemQuotaUtil* GetQuotaUtil() override;
+  const UpdateObserverList* GetUpdateObservers(
       FileSystemType type) const override;
-  virtual const ChangeObserverList* GetChangeObservers(
+  const ChangeObserverList* GetChangeObservers(
       FileSystemType type) const override;
-  virtual const AccessObserverList* GetAccessObservers(
+  const AccessObserverList* GetAccessObservers(
       FileSystemType type) const override;
 
   // Returns an origin enumerator of this backend.