[Extensions] Remove RequestSender::ScopedTabID

extensions/renderer/dispatcher.cc

 // Copyright 2014 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 "extensions/renderer/dispatcher.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <utility>
@@ skipping 966 matching lines @@
 }
 
 void Dispatcher::OnCancelSuspend(const std::string& extension_id) {
   DispatchEvent(extension_id, kOnSuspendCanceledEvent, base::ListValue(),
                 base::DictionaryValue());
 }
 
 void Dispatcher::OnDeliverMessage(int target_port_id,
                                   int source_tab_id,
                                   const Message& message) {
-  std::unique_ptr<RequestSender::ScopedTabID> scoped_tab_id;
-  if (source_tab_id != -1) {
-    scoped_tab_id.reset(new RequestSender::ScopedTabID(
-        bindings_system_->GetRequestSender(), source_tab_id));
-  }
-
   MessagingBindings::DeliverMessage(*script_context_set_, target_port_id,
                                     message,
                                     NULL);  // All render frames.
 }
 
 void Dispatcher::OnDispatchOnConnect(
     int target_port_id,
     const std::string& channel_name,
     const ExtensionMsg_TabConnectionInfo& source,
     const ExtensionMsg_ExternalConnectionInfo& info,
@@ skipping 451 matching lines @@
   // The "guestViewDeny" module must always be loaded last. It registers
   // error-providing custom elements for the GuestView types that are not
   // available, and thus all of those types must have been checked and loaded
   // (or not loaded) beforehand.
   if (context_type == Feature::BLESSED_EXTENSION_CONTEXT) {
     module_system->Require("guestViewDeny");
   }
 }
 
 }  // namespace extensions