Pass the RenderProcessHost id on retargeting.

chrome/browser/tab_contents/retargeting_details.h

Index: chrome/browser/tab_contents/retargeting_details.h
diff --git a/chrome/browser/tab_contents/retargeting_details.h b/chrome/browser/tab_contents/retargeting_details.h
index 53728f9d6b0037d4a37c187aae835cb2876f6ae4..de34aae650e9357df03bf5143284712c7f839750 100644
--- a/chrome/browser/tab_contents/retargeting_details.h
+++ b/chrome/browser/tab_contents/retargeting_details.h
@@ -18,6 +18,10 @@ struct RetargetingDetails {
   // The source tab contents.
   content::WebContents* source_web_contents;
 
+  // The RenderProcessHost id of the source render frame from which the
+  // retargeting was triggered.
+  int source_render_process_id;
+
   // The routing id of the source render frame from which the retargeting was
   // triggered.
   int64_t source_render_frame_id;