Implement the filesystem proxy. This allows the FileRef tests to pass in the...

ppapi/proxy/ppb_file_chooser_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/ppb_file_chooser_proxy.h"
 
 #include <queue>
 
 #include "ppapi/c/dev/ppb_file_chooser_dev.h"
 #include "ppapi/c/pp_errors.h"
@@ skipping 27 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(FileChooser);
 };
 
 FileChooser::FileChooser(const HostResource& resource)
     : PluginResource(resource),
       current_show_callback_(PP_MakeCompletionCallback(NULL, NULL)) {
 }
 
 FileChooser::~FileChooser() {
   // Always need to fire completion callbacks to prevent a leak in the plugin.
-  if (current_show_callback_.func)
-    PP_RunCompletionCallback(&current_show_callback_, PP_ERROR_ABORTED);
+  if (current_show_callback_.func) {
+    // TODO(brettw) the callbacks at this level should be refactored with a
+    // more automatic tracking system like we have in the renderer.
+    MessageLoop::current()->PostTask(FROM_HERE, NewRunnableFunction(
+        current_show_callback_.func, current_show_callback_.user_data,
+        static_cast<int32_t>(PP_ERROR_ABORTED)));
+  }
 
   // Any existing files we haven't transferred ownership to the plugin need
   // to be freed.
   PluginResourceTracker* tracker = PluginResourceTracker::GetInstance();
   while (!file_queue_.empty()) {
     tracker->ReleaseResource(file_queue_.front());
     file_queue_.pop();
   }
 }
 
@@ skipping 177 matching lines @@
       files.push_back(cur_create_info);
     }
   }
 
   dispatcher()->Send(new PpapiMsg_PPBFileChooser_ChooseComplete(
       INTERFACE_ID_PPB_FILE_CHOOSER, chooser, result, files));
 }
 
 }  // namespace proxy
 }  // namespace pp