[fsp] Create a RequestManager per a ProvidedFileSystem instance.

chrome/browser/chromeos/file_system_provider/fake_provided_file_system.cc

 // Copyright 2014 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/chromeos/file_system_provider/fake_provided_file_system.h"
 
 #include "base/files/file.h"
 #include "base/message_loop/message_loop_proxy.h"
-#include "chrome/browser/chromeos/file_system_provider/request_manager.h"
 #include "extensions/browser/event_router.h"
 
 namespace chromeos {
 namespace file_system_provider {
 
 FakeProvidedFileSystem::FakeProvidedFileSystem(
     const ProvidedFileSystemInfo& file_system_info)
     : file_system_info_(file_system_info) {}
 
 FakeProvidedFileSystem::~FakeProvidedFileSystem() {}
 
 bool FakeProvidedFileSystem::RequestUnmount(
     const fileapi::AsyncFileUtil::StatusCallback& callback) {
   base::MessageLoopProxy::current()->PostTask(
       FROM_HERE, base::Bind(callback, base::File::FILE_OK));
   return true;
 }
 
 const ProvidedFileSystemInfo& FakeProvidedFileSystem::GetFileSystemInfo()
     const {
   return file_system_info_;
 }
 
+RequestManager* FakeProvidedFileSystem::GetRequestManager() {
+  NOTREACHED();
+  return NULL;
+}
+
 ProvidedFileSystemInterface* FakeProvidedFileSystem::Create(
     extensions::EventRouter* event_router,
-    RequestManager* request_manager,
     const ProvidedFileSystemInfo& file_system_info) {
-  // TODO(mtomasz): Create a request manager in ProvidedFileSystem, since it is
-  // only used by ProvidedFileSystem, instead of having a profile wide one.
-  // As a result, there will be no need to pass the request manager to the
-  // factory callback.
   return new FakeProvidedFileSystem(file_system_info);
 }
 
 }  // namespace file_system_provider
 }  // namespace chromeos