FileSystem code cleanup 2nd cut - introduce SandboxedFileSystemOperation

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(
@@ skipping 18 matching lines @@
 }
 
 void BrowserFileSystemCallbackDispatcher::DidReadDirectory(
     const std::vector<base::FileUtilProxy::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 std::string&, const FilePath&) {
-  NOTREACHED();
+    const std::string& name, const FilePath& path) {
+  dispatcher_host_->Send(
+      new ViewMsg_OpenFileSystemRequest_Complete(
+          request_id_, !path.empty(), name, path));
+  dispatcher_host_->RemoveCompletedOperation(request_id_);
 }
 
 void BrowserFileSystemCallbackDispatcher::DidFail(
     base::PlatformFileError error_code) {
   dispatcher_host_->Send(new ViewMsg_FileSystem_DidFail(
       request_id_, error_code));
   dispatcher_host_->RemoveCompletedOperation(request_id_);
 }
 
 void BrowserFileSystemCallbackDispatcher::DidWrite(
     int64 bytes,
     bool complete) {
   dispatcher_host_->Send(new ViewMsg_FileSystem_DidWrite(
       request_id_, bytes, complete));
   if (complete)
     dispatcher_host_->RemoveCompletedOperation(request_id_);
 }