Implement SandboxFileWriter and rewrite FileWriterDelegate to use it

webkit/fileapi/file_writer_delegate.h

Index: webkit/fileapi/file_writer_delegate.h
diff --git a/webkit/fileapi/file_writer_delegate.h b/webkit/fileapi/file_writer_delegate.h
index 3b58ae0f647572549c74e38b6e1d45b7414962d8..192b2cf54130fd48ab3b076f7c066f1c3d139704 100644
--- a/webkit/fileapi/file_writer_delegate.h
+++ b/webkit/fileapi/file_writer_delegate.h
@@ -20,17 +20,16 @@ namespace fileapi {
 class FileSystemOperation;
 class FileSystemOperationContext;
 class FileSystemQuotaUtil;
+class FileWriter;
 
 class FileWriterDelegate : public net::URLRequest::Delegate {
  public:
   FileWriterDelegate(
       FileSystemOperation* write_operation,
-      const FileSystemPath& path,
-      int64 offset);
+      scoped_ptr<FileWriter> file_writer);
   virtual ~FileWriterDelegate();
 
-  void Start(base::PlatformFile file,
-             scoped_ptr<net::URLRequest> request);
+  void Start(scoped_ptr<net::URLRequest> request);
 
   // Cancels the current write operation.  Returns true if it is ok to
   // delete this instance immediately.  Otherwise this will call
@@ -38,8 +37,6 @@ class FileWriterDelegate : public net::URLRequest::Delegate {
   // perform the final cleanup.
   bool Cancel();
 
-  base::PlatformFile file() const { return file_; }
-
   virtual void OnReceivedRedirect(net::URLRequest* request,
                                   const GURL& new_url,
                                   bool* defer_redirect) OVERRIDE;
@@ -66,25 +63,19 @@ class FileWriterDelegate : public net::URLRequest::Delegate {
   void OnDataWritten(int write_response);
   void OnError(base::PlatformFileError error);
   void OnProgress(int bytes_read, bool done);
+  void OnWriteCancelled(int status);
 
   FileSystemOperationContext* file_system_operation_context() const;
   FileSystemQuotaUtil* quota_util() const;
 
   FileSystemOperation* file_system_operation_;
-  base::PlatformFile file_;
-  FileSystemPath path_;
-  int64 size_;
-  int64 offset_;
-  bool has_pending_write_;
+  scoped_ptr<FileWriter> file_writer_;
   base::Time last_progress_event_time_;
   int bytes_written_backlog_;
   int bytes_written_;
   int bytes_read_;
-  int64 total_bytes_written_;
-  int64 allowed_bytes_to_write_;
   scoped_refptr<net::IOBufferWithSize> io_buffer_;
   scoped_refptr<net::DrainableIOBuffer> cursor_;
-  scoped_ptr<net::FileStream> file_stream_;
   scoped_ptr<net::URLRequest> request_;
   base::WeakPtrFactory<FileWriterDelegate> weak_factory_;
 };