Implement the file chooser as a new resource "host"

content/renderer/pepper/content_renderer_pepper_host_factory.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/content_renderer_pepper_host_factory.h"
 
+#include "content/renderer/pepper/pepper_file_chooser_host.h"
 #include "ppapi/host/resource_host.h"
 #include "ppapi/proxy/ppapi_messages.h"
 
 using ppapi::host::ResourceHost;
 
 namespace content {
 
 ContentRendererPepperHostFactory::ContentRendererPepperHostFactory(
     RenderViewImpl* render_view)
     : render_view_(render_view) {
 }
 
 ContentRendererPepperHostFactory::~ContentRendererPepperHostFactory() {
 }
 
 scoped_ptr<ResourceHost> ContentRendererPepperHostFactory::CreateResourceHost(
     ppapi::host::PpapiHost* host,
     const ppapi::proxy::ResourceMessageCallParams& params,
     PP_Instance instance,
     const IPC::Message& message) {
+  switch (message.type()) {
+    case PpapiHostMsg_FileChooser_Create::ID:
+      return scoped_ptr<ResourceHost>(new PepperFileChooserHost(
+          host, instance, params.pp_resource(), render_view_));
+  }
   return scoped_ptr<ResourceHost>();
 }
 
 }  // namespace content