SyncFS: Introduce SyncFileSystemBackend

webkit/browser/fileapi/isolated_file_system_backend.cc

 // 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.
 
 #include "webkit/browser/fileapi/isolated_file_system_backend.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
@@ skipping 54 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));
 }
 
 FileSystemFileUtil* IsolatedFileSystemBackend::GetFileUtil(
-    FileSystemType type) {
+    FileSystemType type,
+    const FileSystemContext* context) {
   switch (type) {
     case kFileSystemTypeNativeLocal:
       return isolated_file_util_->sync_file_util();
     case kFileSystemTypeDragged:
       return dragged_file_util_->sync_file_util();
     case kFileSystemTypeForTransientFile:
       return transient_file_util_->sync_file_util();
     default:
       NOTREACHED();
   }
   return NULL;
 }
 
 AsyncFileUtil* IsolatedFileSystemBackend::GetAsyncFileUtil(
-    FileSystemType type) {
+    FileSystemType type,
+    const FileSystemContext* context) {
   switch (type) {
     case kFileSystemTypeNativeLocal:
       return isolated_file_util_.get();
     case kFileSystemTypeDragged:
       return dragged_file_util_.get();
     case kFileSystemTypeForTransientFile:
       return transient_file_util_.get();
     default:
       NOTREACHED();
   }
@@ skipping 35 matching lines @@
   return scoped_ptr<FileStreamWriter>(new LocalFileStreamWriter(
       context->task_runners()->file_task_runner(), url.path(), offset));
 }
 
 FileSystemQuotaUtil* IsolatedFileSystemBackend::GetQuotaUtil() {
   // No quota support.
   return NULL;
 }
 
 }  // namespace fileapi