Standardize usage of virtual/override/final in storage/

storage/browser/fileapi/file_system_dir_url_request_job.h

Index: storage/browser/fileapi/file_system_dir_url_request_job.h
diff --git a/storage/browser/fileapi/file_system_dir_url_request_job.h b/storage/browser/fileapi/file_system_dir_url_request_job.h
index 3423182a779583e94836d6077112442f7d580c29..f2567e460420e12a51092d56686bd4fc3b6de773 100644
--- a/storage/browser/fileapi/file_system_dir_url_request_job.h
+++ b/storage/browser/fileapi/file_system_dir_url_request_job.h
@@ -32,22 +32,20 @@ class STORAGE_EXPORT_PRIVATE FileSystemDirURLRequestJob
       FileSystemContext* file_system_context);
 
   // URLRequestJob methods:
-  virtual void Start() override;
-  virtual void Kill() override;
-  virtual bool ReadRawData(net::IOBuffer* buf,
-                           int buf_size,
-                           int* bytes_read) override;
-  virtual bool GetCharset(std::string* charset) override;
+  void Start() override;
+  void Kill() override;
+  bool ReadRawData(net::IOBuffer* buf, int buf_size, int* bytes_read) override;
+  bool GetCharset(std::string* charset) override;
 
   // FilterContext methods (via URLRequestJob):
-  virtual bool GetMimeType(std::string* mime_type) const override;
+  bool GetMimeType(std::string* mime_type) const override;
   // TODO(adamk): Implement GetResponseInfo and GetResponseCode to simulate
   // an HTTP response.
 
  private:
   class CallbackDispatcher;
 
-  virtual ~FileSystemDirURLRequestJob();
+  ~FileSystemDirURLRequestJob() override;
 
   void StartAsync();
   void DidAttemptAutoMount(base::File::Error result);