Add Worker support for FileSystem API.

chrome/browser/file_system/browser_file_system_callback_dispatcher.cc

 // Copyright (c) 2010 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/file_system/browser_file_system_callback_dispatcher.h"
 
 #include "chrome/browser/file_system/file_system_dispatcher_host.h"
+#include "chrome/common/render_messages.h"
 
 BrowserFileSystemCallbackDispatcher::BrowserFileSystemCallbackDispatcher(
     FileSystemDispatcherHost* dispatcher_host, int request_id)
     : dispatcher_host_(dispatcher_host),
       request_id_(request_id) {
   DCHECK(dispatcher_host_);
 }
 
 void BrowserFileSystemCallbackDispatcher::DidSucceed() {
   dispatcher_host_->Send(new ViewMsg_FileSystem_DidSucceed(request_id_));
   dispatcher_host_->RemoveCompletedOperation(request_id_);
 }
 
 void BrowserFileSystemCallbackDispatcher::DidReadMetadata(
     const base::PlatformFileInfo& info) {
   dispatcher_host_->Send(new ViewMsg_FileSystem_DidReadMetadata(
       request_id_, info));
   dispatcher_host_->RemoveCompletedOperation(request_id_);
 }
 
 void BrowserFileSystemCallbackDispatcher::DidReadDirectory(
     const std::vector<base::file_util_proxy::Entry>& entries, bool has_more) {
   dispatcher_host_->Send(new ViewMsg_FileSystem_DidReadDirectory(
       request_id_, entries, has_more));
   dispatcher_host_->RemoveCompletedOperation(request_id_);
 }
 
 void BrowserFileSystemCallbackDispatcher::DidOpenFileSystem(
-    const string16&, const FilePath&) {
+    const std::string&, const FilePath&) {
   NOTREACHED();
 }
 
 void BrowserFileSystemCallbackDispatcher::DidFail(
     base::PlatformFileError error_code) {
   dispatcher_host_->Send(new ViewMsg_FileSystem_DidFail(
       request_id_, error_code));
   dispatcher_host_->RemoveCompletedOperation(request_id_);
 }