Convert the async device ID getter to a chrome resource host

chrome/renderer/pepper/pepper_helper.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 "chrome/renderer/pepper/pepper_helper.h"
 
 #include "chrome/renderer/pepper/chrome_renderer_pepper_host_factory.h"
 #include "chrome/renderer/pepper/pepper_flash_renderer_message_filter.h"
 #include "content/public/renderer/renderer_ppapi_host.h"
 #include "ppapi/host/ppapi_host.h"
 
 namespace chrome {
 
 PepperHelper::PepperHelper(content::RenderView* render_view)
     : RenderViewObserver(render_view) {
 }
 
 PepperHelper::~PepperHelper() {
 }
 
 void PepperHelper::DidCreatePepperPlugin(content::RendererPpapiHost* host) {
   // TODO(brettw) figure out how to hook up the host factory. It needs some
   // kind of filter-like system to allow dynamic additions.
-  // new ChromeRendererPepperHostFactory(host);
+  host->GetPpapiHost()->AddHostFactoryFilter(
+      scoped_ptr<ppapi::host::HostFactory>(
+          new ChromeRendererPepperHostFactory));
   host->GetPpapiHost()->AddInstanceMessageFilter(
       scoped_ptr<ppapi::host::InstanceMessageFilter>(
           new PepperFlashRendererMessageFilter(host)));
 }
 
 }  // namespace chrome