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 38 matching lines @@
 #if !defined(OS_CHROMEOS)
     case kFileSystemTypeNativeLocal:
     case kFileSystemTypeNativeForPlatformApp:
       return true;
 #endif
     default:
       return false;
   }
 }
 
+void IsolatedFileSystemBackend::Initialize(const FileSystemContext* context) {
+}
+
 void IsolatedFileSystemBackend::InitializeFileSystem(
     const GURL& origin_url,
     FileSystemType type,
     OpenFileSystemMode mode,
     FileSystemContext* context,
     const InitializeFileSystemCallback& callback) {
   // We never allow opening a new isolated FileSystem via usual OpenFileSystem.
   base::MessageLoopProxy::current()->PostTask(
       FROM_HERE,
       base::Bind(callback,
@@ skipping 67 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