Plumb the referrer throughout the OpenURL APIs....

chrome/browser/views/tabs/tab_strip.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 "chrome/browser/views/tabs/tab_strip.h"
 
 #include "base/gfx/size.h"
 #include "chrome/app/theme/theme_resources.h"
 #include "chrome/browser/profile.h"
 #include "chrome/browser/tab_contents.h"
@@ skipping 690 matching lines @@
   std::wstring title;
   if (!event.GetData().GetURLAndTitle(&url, &title) || !url.is_valid())
     return DragDropTypes::DRAG_NONE;
 
   if (drop_before) {
     UserMetrics::RecordAction(L"Tab_DropURLBetweenTabs", model_->profile());
 
     // Insert a new tab.
     TabContents* contents =
         model_->delegate()->CreateTabContentsForURL(
-            url, model_->profile(), PageTransition::TYPED, false, NULL);
+            url, GURL(), model_->profile(), PageTransition::TYPED, false,
+            NULL);
     model_->AddTabContents(contents, drop_index, PageTransition::GENERATED,
                            true);
   } else {
     UserMetrics::RecordAction(L"Tab_DropURLOnTab", model_->profile());
 
     model_->GetTabContentsAt(drop_index)->controller()->
-        LoadURL(url, PageTransition::GENERATED);
+        LoadURL(url, GURL(), PageTransition::GENERATED);
     model_->SelectTabContentsAt(drop_index, true);
   }
 
   return GetDropEffect(event);
 }
 
 bool TabStrip::GetAccessibleRole(VARIANT* role) {
   DCHECK(role);
 
   role->vt = VT_I4;
@@ skipping 828 matching lines @@
   return last_tab->x() + last_tab->width();
 }
 
 bool TabStrip::IsPointInTab(Tab* tab,
                             const gfx::Point& point_in_tabstrip_coords) {
   gfx::Point point_in_tab_coords(point_in_tabstrip_coords);
   View::ConvertPointToView(this, tab, &point_in_tab_coords);
   return tab->HitTest(point_in_tab_coords);
 }