Implement the file chooser as a new resource "host"

content/renderer/pepper/content_renderer_pepper_host_factory.cc

Index: content/renderer/pepper/content_renderer_pepper_host_factory.cc
diff --git a/content/renderer/pepper/content_renderer_pepper_host_factory.cc b/content/renderer/pepper/content_renderer_pepper_host_factory.cc
index 865196cc1bf14d831367fd2bfe2cc82fbf29de0b..0c11943a981542e51cb4260d79822166b1304bcb 100644
--- a/content/renderer/pepper/content_renderer_pepper_host_factory.cc
+++ b/content/renderer/pepper/content_renderer_pepper_host_factory.cc
@@ -4,6 +4,7 @@
 
 #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"
 
@@ -24,6 +25,11 @@ scoped_ptr<ResourceHost> ContentRendererPepperHostFactory::CreateResourceHost(
     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>();
 }