SyncFS: Introduce SyncFileSystemBackend

chrome/browser/media_galleries/fileapi/media_file_system_backend.cc

 // Copyright (c) 2013 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.
 
 #include "chrome/browser/media_galleries/fileapi/media_file_system_backend.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
@@ skipping 101 matching lines @@
   // We never allow opening a new isolated FileSystem via usual OpenFileSystem.
   base::MessageLoopProxy::current()->PostTask(
       FROM_HERE,
       base::Bind(callback,
                  GetFileSystemRootURI(origin_url, type),
                  GetFileSystemName(origin_url, type),
                  base::PLATFORM_FILE_ERROR_SECURITY));
 }
 
 fileapi::FileSystemFileUtil* MediaFileSystemBackend::GetFileUtil(
-    fileapi::FileSystemType type) {
+    fileapi::FileSystemType type,
+    const fileapi::FileSystemContext* context) {
   NOTREACHED();
   return NULL;
 }
 
 fileapi::AsyncFileUtil* MediaFileSystemBackend::GetAsyncFileUtil(
-    fileapi::FileSystemType type) {
+    fileapi::FileSystemType type,
+    const fileapi::FileSystemContext* context) {
   switch (type) {
     case fileapi::kFileSystemTypeNativeMedia:
       return native_media_file_util_.get();
     case fileapi::kFileSystemTypeDeviceMedia:
       return device_media_async_file_util_.get();
 #if defined(OS_WIN) || defined(OS_MACOSX)
     case fileapi::kFileSystemTypeItunes:
       return itunes_file_util_.get();
     case fileapi::kFileSystemTypePicasa:
       return picasa_file_util_.get();
@@ skipping 67 matching lines @@
           url.path(), offset));
 }
 
 fileapi::FileSystemQuotaUtil*
 MediaFileSystemBackend::GetQuotaUtil() {
   // No quota support.
   return NULL;
 }
 
 }  // namespace chrome