Convert the async device ID getter to a chrome resource host

content/renderer/pepper/mock_renderer_ppapi_host.cc

 // Copyright (c) 2012 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 "content/renderer/pepper/mock_renderer_ppapi_host.h"
 
 
 namespace content {
 
 MockRendererPpapiHost::MockRendererPpapiHost(RenderView* render_view,
                                              PP_Instance instance)
     : sink_(),
-      ppapi_host_(&sink_, NULL, ppapi::PpapiPermissions()),
+      ppapi_host_(&sink_, ppapi::PpapiPermissions()),
       render_view_(render_view),
       pp_instance_(instance),
       has_user_gesture_(false) {
 }
 
 MockRendererPpapiHost::~MockRendererPpapiHost() {
 }
 
 ppapi::host::PpapiHost* MockRendererPpapiHost::GetPpapiHost() {
   return &ppapi_host_;
 }
 
 bool MockRendererPpapiHost::IsValidInstance(PP_Instance instance) const {
   return instance == pp_instance_;
 }
 
 RenderView* MockRendererPpapiHost::GetRenderViewForInstance(
     PP_Instance instance) const {
   if (instance == pp_instance_)
     return render_view_;
   return NULL;
 }
 
 bool MockRendererPpapiHost::HasUserGesture(PP_Instance instance) const {
   return has_user_gesture_;
 }
 
 }  // namespace content