Implement SandboxFileWriter and rewrite FileWriterDelegate to use it

webkit/fileapi/file_system_operation.h

 // Copyright (c) 2012 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 WEBKIT_FILEAPI_FILE_SYSTEM_OPERATION_H_
 #define WEBKIT_FILEAPI_FILE_SYSTEM_OPERATION_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 156 matching lines @@
       int64 usage, int64 quota);
 
   // The 'body' methods that perform the actual work (i.e. posting the
   // file task on proxy_) after the quota check.
   void DoCreateFile(const StatusCallback& callback, bool exclusive);
   void DoCreateDirectory(const StatusCallback& callback,
                          bool exclusive,
                          bool recursive);
   void DoCopy(const StatusCallback& callback);
   void DoMove(const StatusCallback& callback);
-  void DoWrite(scoped_ptr<net::URLRequest> blob_request);
   void DoTruncate(const StatusCallback& callback, int64 length);
   void DoOpenFile(const OpenFileCallback& callback, int file_flags);
 
   // Callback for CreateFile for |exclusive|=true cases.
   void DidEnsureFileExistsExclusive(const StatusCallback& callback,
                                     base::PlatformFileError rv,
                                     bool created);
 
   // Callback for CreateFile for |exclusive|=false cases.
   void DidEnsureFileExistsNonExclusive(const StatusCallback& callback,
@@ skipping 23 matching lines @@
   void DidWrite(base::PlatformFileError rv,
                 int64 bytes,
                 bool complete);
   void DidTouchFile(const StatusCallback& callback,
                     base::PlatformFileError rv);
   void DidOpenFile(const OpenFileCallback& callback,
                    base::PlatformFileError rv,
                    base::PassPlatformFile file,
                    bool created);
 
-  // Helper for Write().
-  void OnFileOpenedForWrite(scoped_ptr<net::URLRequest> blob_request,
-                            FileSystemOperationContext* context_unused,
-                            base::PlatformFileError rv,
-                            base::PassPlatformFile file,
-                            bool created);
-
   // Checks the validity of a given |path_url| and and populates
   // |path| and |file_util| for |mode|.
   base::PlatformFileError SetUpFileSystemPath(
       const GURL& path_url,
       FileSystemPath* file_system_path,
       FileSystemFileUtil** file_util,
       SetUpPathMode mode);
 
   // Used only for internal assertions.
   // Returns false if there's another inflight pending operation.
@@ skipping 35 matching lines @@
   // FileSystemOperation instance is usually deleted upon completion but
   // could be deleted while it has inflight callbacks when Cancel is called.
   base::WeakPtrFactory<FileSystemOperation> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FileSystemOperation);
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_FILE_SYSTEM_OPERATION_H_