Eliminate mojo::Shell client lib class

mojo/services/network/url_loader_factory_impl.cc

 // Copyright 2015 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 "mojo/services/network/url_loader_factory_impl.h"
 
 #include <utility>
 
 #include "mojo/services/network/url_loader_impl.h"
 
 namespace mojo {
 
 URLLoaderFactoryImpl::URLLoaderFactoryImpl(
     NetworkContext* context,
-    scoped_ptr<mojo::AppRefCount> app_refcount,
+    scoped_ptr<mojo::MessageLoopRef> app_refcount,
     InterfaceRequest<URLLoaderFactory> request)
     : context_(context),
       app_refcount_(std::move(app_refcount)),
       binding_(this, std::move(request)) {}
 
 URLLoaderFactoryImpl::~URLLoaderFactoryImpl() {
 }
 
 void URLLoaderFactoryImpl::CreateURLLoader(InterfaceRequest<URLLoader> loader) {
   // TODO(darin): Plumb origin. Use for CORS.
   // TODO(beng): Figure out how to get origin through to here.
   // The loader will delete itself when the pipe is closed, unless a request is
   // in progress. In which case, the loader will delete itself when the request
   // is finished.
   new URLLoaderImpl(context_, std::move(loader), app_refcount_->Clone());
 }
 
 }  // namespace mojo