Eliminate mojo::Shell client lib class

mojo/services/network/cookie_store_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_COOKIE_STORE_IMPL_H_
 #define MOJO_SERVICES_NETWORK_COOKIE_STORE_IMPL_H_
 
 #include "base/macros.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
 #include "mojo/services/network/public/interfaces/cookie_store.mojom.h"
-#include "mojo/shell/public/cpp/shell.h"
+#include "mojo/shell/public/cpp/message_loop_ref.h"
 #include "url/gurl.h"
 
 namespace mojo {
 class NetworkContext;
 
 class CookieStoreImpl : public CookieStore {
  public:
   CookieStoreImpl(NetworkContext* context,
                   const GURL& origin,
-                  scoped_ptr<mojo::AppRefCount> app_refcount,
+                  scoped_ptr<mojo::MessageLoopRef> app_refcount,
                   InterfaceRequest<CookieStore> request);
   ~CookieStoreImpl() override;
 
  private:
   // CookieStore methods:
   void Get(const String& url, const Callback<void(String)>& callback) override;
   void Set(const String& url,
            const String& cookie,
            const Callback<void(bool)>& callback) override;
 
   NetworkContext* context_;
   GURL origin_;
-  scoped_ptr<mojo::AppRefCount> app_refcount_;
+  scoped_ptr<mojo::MessageLoopRef> app_refcount_;
   StrongBinding<CookieStore> binding_;
 
   DISALLOW_COPY_AND_ASSIGN(CookieStoreImpl);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_NETWORK_COOKIE_STORE_IMPL_H_