Make a global enum to differentiate impl & proxy.

ppapi/proxy/ppp_input_event_proxy.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 "ppapi/proxy/ppp_input_event_proxy.h"
 
 #include <algorithm>
 
 #include "ppapi/c/ppp_input_event.h"
 #include "ppapi/proxy/host_dispatcher.h"
@@ skipping 79 matching lines @@
     IPC_MESSAGE_HANDLER(PpapiMsg_PPPInputEvent_HandleFilteredInputEvent,
                         OnMsgHandleFilteredInputEvent)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void PPP_InputEvent_Proxy::OnMsgHandleInputEvent(PP_Instance instance,
                                                  const InputEventData& data) {
   scoped_refptr<PPB_InputEvent_Shared> resource(new PPB_InputEvent_Shared(
-      PPB_InputEvent_Shared::InitAsProxy(), instance, data));
+      OBJECT_IS_PROXY, instance, data));
   ppp_input_event_impl_->HandleInputEvent(instance, resource->pp_resource());
 }
 
 void PPP_InputEvent_Proxy::OnMsgHandleFilteredInputEvent(
     PP_Instance instance,
     const InputEventData& data,
     PP_Bool* result) {
   scoped_refptr<PPB_InputEvent_Shared> resource(new PPB_InputEvent_Shared(
-      PPB_InputEvent_Shared::InitAsProxy(), instance, data));
+      OBJECT_IS_PROXY, instance, data));
   *result = ppp_input_event_impl_->HandleInputEvent(instance,
                                                     resource->pp_resource());
 }
 
 }  // namespace proxy
 }  // namespace ppapi