Eliminate mojo::Shell client lib class

mojo/services/network/url_loader_impl.h

 // 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.
 
 #ifndef MOJO_SERVICES_NETWORK_URL_LOADER_IMPL_H_
 #define MOJO_SERVICES_NETWORK_URL_LOADER_IMPL_H_
 
 #include <stdint.h>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "mojo/message_pump/handle_watcher.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/services/network/public/interfaces/url_loader.mojom.h"
-#include "mojo/shell/public/cpp/shell.h"
+#include "mojo/shell/public/cpp/message_loop_ref.h"
 #include "net/base/net_errors.h"
 #include "net/url_request/url_request.h"
 
 namespace mojo {
 
 class NetworkContext;
 class NetToMojoPendingBuffer;
 
 class URLLoaderImpl : public URLLoader,
                       public net::URLRequest::Delegate {
  public:
   URLLoaderImpl(NetworkContext* context,
                 InterfaceRequest<URLLoader> request,
-                scoped_ptr<mojo::AppRefCount> app_refcount);
+                scoped_ptr<mojo::MessageLoopRef> app_refcount);
   ~URLLoaderImpl() override;
 
   // Called when the associated NetworkContext is going away.
   void Cleanup();
 
  private:
   // URLLoader methods:
   void Start(URLRequestPtr request,
              const Callback<void(URLResponsePtr)>& callback) override;
   void FollowRedirect(const Callback<void(URLResponsePtr)>& callback) override;
@@ skipping 23 matching lines @@
   scoped_ptr<net::URLRequest> url_request_;
   Callback<void(URLResponsePtr)> callback_;
   ScopedDataPipeProducerHandle response_body_stream_;
   scoped_refptr<NetToMojoPendingBuffer> pending_write_;
   common::HandleWatcher handle_watcher_;
   uint32_t response_body_buffer_size_;
   uint32_t response_body_bytes_read_;
   bool auto_follow_redirects_;
   bool connected_;
   Binding<URLLoader> binding_;
-  scoped_ptr<mojo::AppRefCount> app_refcount_;
+  scoped_ptr<mojo::MessageLoopRef> app_refcount_;
 
   base::WeakPtrFactory<URLLoaderImpl> weak_ptr_factory_;
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_NETWORK_URL_LOADER_IMPL_H_