Add a unified resource tracker shared between the proxy and the impl.

webkit/plugins/ppapi/ppb_file_chooser_impl.cc

Index: webkit/plugins/ppapi/ppb_file_chooser_impl.cc
diff --git a/webkit/plugins/ppapi/ppb_file_chooser_impl.cc b/webkit/plugins/ppapi/ppb_file_chooser_impl.cc
index 5fd777e45492eb01b34c7158ea93b4e2a6cf3c14..88ef8c4b3a0e9dca81cf52e1dacf6257f962824c 100644
--- a/webkit/plugins/ppapi/ppb_file_chooser_impl.cc
+++ b/webkit/plugins/ppapi/ppb_file_chooser_impl.cc
@@ -80,9 +80,7 @@ PP_Resource PPB_FileChooser_Impl::Create(
   if ((options->mode != PP_FILECHOOSERMODE_OPEN) &&
       (options->mode != PP_FILECHOOSERMODE_OPENMULTIPLE))
     return 0;
-
-  PPB_FileChooser_Impl* chooser = new PPB_FileChooser_Impl(instance, options);
-  return chooser->GetReference();
+  return (new PPB_FileChooser_Impl(instance, options))->GetReference();
 }
 
 PPB_FileChooser_Impl* PPB_FileChooser_Impl::AsPPB_FileChooser_Impl() {
@@ -129,10 +127,8 @@ void PPB_FileChooser_Impl::RegisterCallback(
   DCHECK(callback.func);
   DCHECK(!callback_.get() || callback_->completed());
 
-  PP_Resource resource_id = GetReferenceNoAddRef();
-  CHECK(resource_id);
   callback_ = new TrackedCompletionCallback(
-      instance()->module()->GetCallbackTracker(), resource_id, callback);
+      instance()->module()->GetCallbackTracker(), pp_resource(), callback);
 }
 
 void PPB_FileChooser_Impl::RunCallback(int32_t result) {