PPAPI: Get TrackedCallback ready for running on non-main threads.

ppapi/proxy/file_chooser_resource.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/file_chooser_resource.h"
 
 #include "base/string_split.h"
 #include "ipc/ipc_message.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/proxy/dispatch_reply_message.h"
@@ skipping 108 matching lines @@
     // Convert each of the passed in file infos to resources. These will be
     // owned by the FileChooser object until they're passed to the plugin.
     DCHECK(file_queue_.empty());
     for (size_t i = 0; i < chosen_files.size(); i++) {
       file_queue_.push(PPB_FileRef_Proxy::DeserializeFileRef(
           chosen_files[i]));
     }
   }
 
   // Notify the plugin of the new data.
-  TrackedCallback::ClearAndRun(&callback_, params.result());
+  callback_->Run(params.result());
   // DANGER: May delete |this|!
 }
 
 int32_t FileChooserResource::ShowInternal(
     PP_Bool save_as,
     const PP_Var& suggested_file_name,
     scoped_refptr<TrackedCallback> callback) {
   if (TrackedCallback::IsPending(callback_))
     return PP_ERROR_INPROGRESS;
 
   if (!sent_create_to_renderer())
     SendCreateToRenderer(PpapiHostMsg_FileChooser_Create());
 
   callback_ = callback;
   StringVar* sugg_str = StringVar::FromPPVar(suggested_file_name);
 
   CallRenderer(PpapiHostMsg_FileChooser_Show(
       PP_ToBool(save_as),
       mode_ == PP_FILECHOOSERMODE_OPENMULTIPLE,
       sugg_str ? sugg_str->value() : std::string(),
       accept_types_));
   return PP_OK_COMPLETIONPENDING;
 }
 
 }  // namespace proxy
 }  // namespace ppapi