Plumb the referrer throughout the OpenURL APIs....

chrome/browser/views/tabs/dragged_tab_controller.h

 // 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.
 
 #ifndef CHROME_BROWSER_VIEWS_TABS_DRAGGED_TAB_CONTROLLER_H_
 #define CHROME_BROWSER_VIEWS_TABS_DRAGGED_TAB_CONTROLLER_H_
 
 #include "base/gfx/rect.h"
 #include "base/message_loop.h"
 #include "chrome/browser/tab_contents_delegate.h"
@@ skipping 62 matching lines @@
     // The drag session was canceled (alt-tab during drag, escape ...)
     CANCELED,
 
     // The tab (NavigationController) was destroyed during the drag.
     TAB_DESTROYED
   };
 
   // Overridden from TabContentsDelegate:
   virtual void OpenURLFromTab(TabContents* source,
                               const GURL& url,
+                              const GURL& referrer,
                               WindowOpenDisposition disposition,
                               PageTransition::Type transition);
   virtual void NavigationStateChanged(const TabContents* source,
                                       unsigned changed_flags);
   virtual void ReplaceContents(TabContents* source,
                                TabContents* new_contents);
   virtual void AddNewContents(TabContents* source,
                               TabContents* new_contents,
                               WindowOpenDisposition disposition,
                               const gfx::Rect& initial_pos,
@@ skipping 183 matching lines @@
 
   // The horizontal position of the mouse cursor in screen coordinates at the
   // time of the last re-order event.
   int last_move_screen_x_;
 
   DISALLOW_COPY_AND_ASSIGN(DraggedTabController);
 };
 
 #endif  // CHROME_BROWSER_VIEWS_TABS_DRAGGED_TAB_CONTROLLER_H_