Make a global enum to differentiate impl & proxy.

ppapi/proxy/ppb_message_loop_proxy.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 "ppapi/proxy/ppb_message_loop_proxy.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
@@ skipping 68 matching lines @@
 
   // Since we allow tasks to be posted before the message loop is actually
   // created (when it's associated with a thread), we keep tasks posted here
   // until that happens. Once the loop_ is created, this is unused.
   std::vector<TaskInfo> pending_tasks_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageLoopResource);
 };
 
 MessageLoopResource::MessageLoopResource(PP_Instance instance)
-    : Resource(HostResource::MakeInstanceOnly(instance)),
+    : Resource(OBJECT_IS_PROXY, instance),
       nested_invocations_(0),
       destroyed_(false),
       should_destroy_(false) {
 }
 
 MessageLoopResource::~MessageLoopResource() {
 }
 
 PPB_MessageLoop_API* MessageLoopResource::AsPPB_MessageLoop_API() {
   return this;
@@ skipping 186 matching lines @@
 PPB_MessageLoop_Proxy::~PPB_MessageLoop_Proxy() {
 }
 
 // static
 const PPB_MessageLoop_Dev_0_1* PPB_MessageLoop_Proxy::GetInterface() {
   return &ppb_message_loop_interface;
 }
 
 }  // namespace proxy
 }  // namespace ppapi