Add sync context dispatch restriction

content/renderer/pepper_plugin_delegate_impl.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 "content/renderer/pepper_plugin_delegate_impl.h"
 
 #include <cmath>
 #include <queue>
 
 #include "base/callback.h"
@@ skipping 303 matching lines @@
     PP_Module pp_module,
     pp::proxy::Dispatcher::GetInterfaceFunc local_get_interface) {
   dispatcher_.reset(new pp::proxy::HostDispatcher(
       plugin_process_handle, pp_module, local_get_interface));
 
   if (!dispatcher_->InitWithChannel(PepperPluginRegistry::GetInstance(),
                                     channel_handle, true)) {
     dispatcher_.reset();
     return false;
   }
+  dispatcher_->channel()->SetRestrictDispatchToSameChannel(true);
   return true;
 }
 
 }  // namespace
 
 PepperPluginDelegateImpl::PepperPluginDelegateImpl(RenderView* render_view)
     : render_view_(render_view),
       has_saved_context_menu_action_(false),
       saved_context_menu_action_(0),
       id_generator_(0) {
@@ skipping 541 matching lines @@
 }
 
 void PepperPluginDelegateImpl::HasUnsupportedFeature() {
   render_view_->Send(new ViewHostMsg_PDFHasUnsupportedFeature(
       render_view_->routing_id()));
 }
 
 P2PSocketDispatcher* PepperPluginDelegateImpl::GetP2PSocketDispatcher() {
   return render_view_->p2p_socket_dispatcher();
 }