Pass the RenderProcessHost id on retargeting.

chrome/browser/ui/browser.cc

 // Copyright 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 "chrome/browser/ui/browser.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <string>
@@ skipping 1582 matching lines @@
     // If a BackgroundContents is created, suppress the normal WebContents.
     return !MaybeCreateBackgroundContents(
         route_id, main_frame_route_id, main_frame_widget_route_id, web_contents,
         frame_name, target_url, partition_id, session_storage_namespace);
   }
 
   return true;
 }
 
 void Browser::WebContentsCreated(WebContents* source_contents,
+                                 int opener_render_process_id,
                                  int opener_render_frame_id,
                                  const std::string& frame_name,
                                  const GURL& target_url,
                                  WebContents* new_contents) {
   // Adopt the WebContents now, so all observers are in place, as the network
   // requests for its initial navigation will start immediately. The WebContents
   // will later be inserted into this browser using Browser::Navigate via
   // AddNewContents.
   TabHelpers::AttachTabHelpers(new_contents);
 
   // Make the tab show up in the task manager.
   task_manager::WebContentsTags::CreateForTabContents(new_contents);
 
   // Notify.
   RetargetingDetails details;
   details.source_web_contents = source_contents;
+  details.source_render_process_id = opener_render_process_id;
   details.source_render_frame_id = opener_render_frame_id;
   details.target_url = target_url;
   details.target_web_contents = new_contents;
   details.not_yet_in_tabstrip = true;
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_RETARGETING,
       content::Source<Profile>(profile_),
       content::Details<RetargetingDetails>(&details));
 }
 
@@ skipping 943 matching lines @@
   if (contents && !allow_js_access) {
     contents->web_contents()->GetController().LoadURL(
         target_url,
         content::Referrer(),
         ui::PAGE_TRANSITION_LINK,
         std::string());  // No extra headers.
   }
 
   return contents != NULL;
 }