Make a global enum to differentiate impl & proxy.

ppapi/proxy/ppb_url_loader_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_url_loader_proxy.h"
 
 #include <algorithm>
 #include <deque>
 #include <vector>
 
@@ skipping 139 matching lines @@
 
   // Cached copy of the response info. When nonzero, we're holding a reference
   // to this resource.
   PP_Resource response_info_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(URLLoader);
 };
 
 URLLoader::URLLoader(const HostResource& resource)
-    : Resource(resource),
+    : Resource(OBJECT_IS_PROXY, resource),
       bytes_sent_(-1),
       total_bytes_to_be_sent_(-1),
       bytes_received_(-1),
       total_bytes_to_be_received_(-1),
       current_read_buffer_(NULL),
       current_read_buffer_size_(0),
       response_info_(0) {
 }
 
 URLLoader::~URLLoader() {
@@ skipping 424 matching lines @@
 }
 
 void PPB_URLLoader_Proxy::OnCallback(int32_t result,
                                      const HostResource& resource) {
   dispatcher()->Send(new PpapiMsg_PPBURLLoader_CallbackComplete(
       API_ID_PPB_URL_LOADER, resource, result));
 }
 
 }  // namespace proxy
 }  // namespace ppapi