Wired support for file truncating with RemoteFileSystemOperation::OpenFile() method (case when base…

chrome/browser/chromeos/gdata/gdata_file_system_proxy.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 CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_PROXY_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_PROXY_H_
 
 #include "chrome/browser/chromeos/gdata/gdata_errorcode.h"
 #include "webkit/chromeos/fileapi/remote_file_system_proxy.h"
 
@@ skipping 137 matching lines @@
       GDataFileError open_result,
       const FilePath& local_cache_path);
 
   // Invoked during Truncate() operation. This is called when the truncation of
   // a local cache file is finished on FILE thread.
   void DidTruncate(
       const FilePath& virtual_path,
       const fileapi::FileSystemOperationInterface::StatusCallback& callback,
       base::PlatformFileError* truncate_result);
 
+  // Invoked during OpenFile() operation when truncate or write flags are set.
+  // This is called when a local modifiable cached file is ready for such
+  // operation.
+  void OnOpenFileForWriting(
+      int file_flags,
+      base::ProcessHandle peer_handle,
+      const fileapi::FileSystemOperationInterface::OpenFileCallback& callback,
+      GDataFileError gdata_error,
+      const FilePath& local_cache_path);
+
+  // Invoked during OpenFile() operation when file create flags are set.
+  void OnCreateFileForOpen(
+      const FilePath& file_path,
+      int file_flags,
+      base::ProcessHandle peer_handle,
+      const fileapi::FileSystemOperationInterface::OpenFileCallback& callback,
+      GDataFileError gdata_error);
+
+  // Invoked during OpenFile() operation when base::PLATFORM_FILE_OPEN_TRUNCATED
+  // flag is set. This is called when the truncation of a local cache file is
+  // finished on FILE thread.
+  void OnOpenAndTruncate(
+      base::ProcessHandle peer_handle,
+      const fileapi::FileSystemOperationInterface::OpenFileCallback& callback,
+      base::PlatformFile* platform_file,
+      base::PlatformFileError* truncate_result);
+
   // GDataFileSystemProxy is owned by Profile, which outlives
   // GDataFileSystemProxy, which is owned by CrosMountPointProvider (i.e. by
   // the time Profile is removed, the file manager is already gone). Hence
   // it's safe to use this as a raw pointer.
   GDataFileSystemInterface* file_system_;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_PROXY_H_