Cleanup the remaining references to source_view_id

content/browser/message_port_provider.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 "content/public/browser/message_port_provider.h"
 
 #include "base/basictypes.h"
 #include "content/browser/browser_thread_impl.h"
 #include "content/browser/message_port_message_filter.h"
 #include "content/browser/message_port_service.h"
@@ skipping 10 matching lines @@
     WebContents* web_contents,
     const base::string16& source_origin,
     const base::string16& target_origin,
     const base::string16& data,
     const std::vector<TransferredMessagePort>& ports) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   FrameMsg_PostMessage_Params params;
   params.is_data_raw_string = true;
   params.data = data;
-  // Blink requires a source frame to transfer ports. This is why a
-  // source routing id is set here. See WebDOMMessageEvent::initMessageEvent()
-  // TODO(alexmos, sgurun): Clean this up once crbug.com/473258 is fixed.
-  // Once message ports can work with a null source frame,
-  // source_view_routing_id can be removed, and this can just pass in
-  // MSG_ROUTING_NONE for the source frame.
-  params.source_view_routing_id = web_contents->GetRoutingID();
   params.source_routing_id = MSG_ROUTING_NONE;
   params.source_origin = source_origin;
   params.target_origin = target_origin;
   params.message_ports = ports;
 
   RenderProcessHostImpl* rph =
       static_cast<RenderProcessHostImpl*>(web_contents->GetRenderProcessHost());
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&MessagePortMessageFilter::RouteMessageEventWithMessagePorts,
@@ skipping 59 matching lines @@
 // static
 void MessagePortProvider::UpdateMessagePort(int message_port_id,
                                             MessagePortDelegate* delegate) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   MessagePortService::GetInstance()->UpdateMessagePort(message_port_id,
                                                        delegate,
                                                        message_port_id);
 }
 
 } // namespace content