Pass the RenderProcessHost id on retargeting.

chrome/browser/ui/browser.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_BROWSER_H_
 #define CHROME_BROWSER_UI_BROWSER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 603 matching lines @@
       content::WebContents* web_contents,
       int32_t route_id,
       int32_t main_frame_route_id,
       int32_t main_frame_widget_route_id,
       WindowContainerType window_container_type,
       const std::string& frame_name,
       const GURL& target_url,
       const std::string& partition_id,
       content::SessionStorageNamespace* session_storage_namespace) override;
   void WebContentsCreated(content::WebContents* source_contents,
+                          int opener_render_process_id,
                           int opener_render_frame_id,
                           const std::string& frame_name,
                           const GURL& target_url,
                           content::WebContents* new_contents) override;
   void RendererUnresponsive(content::WebContents* source) override;
   void RendererResponsive(content::WebContents* source) override;
   void DidNavigateMainFramePostCommit(
       content::WebContents* web_contents) override;
   content::JavaScriptDialogManager* GetJavaScriptDialogManager(
       content::WebContents* source) override;
@@ skipping 374 matching lines @@
   // The following factory is used for chrome update coalescing.
   base::WeakPtrFactory<Browser> chrome_updater_factory_;
 
   // The following factory is used to close the frame at a later time.
   base::WeakPtrFactory<Browser> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Browser);
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_H_