Replace the GURL referrer field of OpenURLParams with a content::Referrer

chrome/browser/ui/gtk/sad_tab_gtk.cc

 // Copyright (c) 2011 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/gtk/sad_tab_gtk.h"
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/google/google_util.h"
 #include "chrome/browser/ui/gtk/gtk_chrome_link_button.h"
 #include "chrome/common/url_constants.h"
@@ skipping 143 matching lines @@
 }
 
 void SadTabGtk::OnLinkButtonClick(GtkWidget* sender) {
   if (tab_contents_ != NULL) {
     GURL help_url =
         google_util::AppendGoogleLocaleParam(GURL(
             kind_ == CRASHED ?
             chrome::kCrashReasonURL :
             chrome::kKillReasonURL));
     tab_contents_->OpenURL(OpenURLParams(
-        help_url, GURL(), CURRENT_TAB, content::PAGE_TRANSITION_LINK, false));
+        help_url, content::Referrer(), CURRENT_TAB,
+        content::PAGE_TRANSITION_LINK, false));
   }
 }