Make a global enum to differentiate impl & proxy.

ppapi/proxy/ppb_file_chooser_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_file_chooser_proxy.h"
 
 #include <queue>
 
 #include "base/bind.h"
 #include "ppapi/c/dev/ppb_file_chooser_dev.h"
@@ skipping 55 matching lines @@
 
   // All files returned by the current show callback that haven't yet been
   // given to the plugin. The plugin will repeatedly call us to get the next
   // file, and we'll vend those out of this queue, removing them when ownership
   // has transferred to the plugin.
   std::queue<PP_Resource> file_queue_;
 
   DISALLOW_COPY_AND_ASSIGN(FileChooser);
 };
 
-FileChooser::FileChooser(const HostResource& resource) : Resource(resource) {
+FileChooser::FileChooser(const HostResource& resource)
+    : Resource(OBJECT_IS_PROXY, resource) {
 }
 
 FileChooser::~FileChooser() {
   // Any existing files we haven't transferred ownership to the plugin need
   // to be freed.
   ResourceTracker* tracker = PpapiGlobals::Get()->GetResourceTracker();
   while (!file_queue_.empty()) {
     tracker->ReleaseResource(file_queue_.front());
     file_queue_.pop();
   }
@@ skipping 181 matching lines @@
       files.push_back(cur_create_info);
     }
   }
 
   dispatcher()->Send(new PpapiMsg_PPBFileChooser_ChooseComplete(
       API_ID_PPB_FILE_CHOOSER, chooser, result, files));
 }
 
 }  // namespace proxy
 }  // namespace ppapi