Plumb the referrer throughout the OpenURL APIs....

webkit/glue/webframeloaderclient_impl.cc

 // Copyright (c) 2006-2008 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 "config.h"
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 
@@ skipping 899 matching lines @@
 
       disposition = d->DispositionForNavigationAction(
           wv, webframe_, &ds->GetRequest(), webnav_type, disposition, is_redirect);
     
       if (disposition != IGNORE_ACTION) {
         if (disposition == CURRENT_TAB) {
           policy_action = PolicyUse;
         } else if (disposition == SAVE_TO_DISK) {
           policy_action = PolicyDownload;
         } else {
+          GURL referrer = webkit_glue::StringToGURL(
+              request.httpHeaderField("Referer"));
+
           d->OpenURL(webframe_->webview_impl(),
                      webkit_glue::KURLToGURL(request.url()),
+                     referrer,
                      disposition);
           policy_action = PolicyIgnore;
         }
       } else {
         policy_action = PolicyIgnore;
       }
     }
   } else {
     policy_action = PolicyIgnore;
   }
@@ skipping 535 matching lines @@
     return false;
 
   DCHECK(disposition);
   if (middle_or_ctrl)
     *disposition = shift ? NEW_FOREGROUND_TAB : NEW_BACKGROUND_TAB;
   else
     *disposition = shift ? NEW_WINDOW : SAVE_TO_DISK;
   return true;
 }