Remove webkit::ppapi::Resource.

webkit/plugins/ppapi/ppb_input_event_impl.cc

 // Copyright (c) 2011 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 "webkit/plugins/ppapi/ppb_input_event_impl.h"
 
 #include "ppapi/shared_impl/var.h"
 #include "webkit/plugins/ppapi/plugin_module.h"
 #include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
+#include "webkit/plugins/ppapi/resource_helper.h"
 
 using ppapi::InputEventData;
 using ppapi::InputEventImpl;
 using ppapi::StringVar;
 using ppapi::thunk::PPB_InputEvent_API;
 
 namespace webkit {
 namespace ppapi {
 
-PPB_InputEvent_Impl::PPB_InputEvent_Impl(PluginInstance* instance,
+PPB_InputEvent_Impl::PPB_InputEvent_Impl(PP_Instance instance,
                                          const InputEventData& data)
     : Resource(instance),
       InputEventImpl(data) {
 }
 
-// static
-PP_Resource PPB_InputEvent_Impl::Create(PluginInstance* instance,
-                                        const InputEventData& data) {
-  return (new PPB_InputEvent_Impl(instance, data))->GetReference();
-}
-
 PPB_InputEvent_API* PPB_InputEvent_Impl::AsPPB_InputEvent_API() {
   return this;
 }
 
 PP_Var PPB_InputEvent_Impl::StringToPPVar(const std::string& str) {
-  return StringVar::StringToPPVar(instance()->module()->pp_module(), str);
+  PluginModule* plugin_module = ResourceHelper::GetPluginModule(this);
+  if (!plugin_module)
+    return PP_MakeUndefined();
+  return StringVar::StringToPPVar(plugin_module->pp_module(), str);
 }
 
 }  // namespace ppapi
 }  // namespace webkit