Plumb the referrer throughout the OpenURL APIs....

chrome/browser/tab_contents_delegate.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_TAB_CONTENTS_DELEGATE_H_
 #define CHROME_BROWSER_TAB_CONTENTS_DELEGATE_H_
 
 // TODO(maruel):  Remove once UINT and HWND are replaced / typedef.
 #include <windows.h>
 
 #include "chrome/browser/page_navigator.h"
 #include "chrome/common/navigation_types.h"
 
 namespace gfx {
 class Point;
 class Rect;
 }
 
 class TabContents;
 class HtmlDialogContentsDelegate;
 
 // Objects implement this interface to get notified about changes in the
 // TabContents and to provide necessary functionality.
 class TabContentsDelegate : public PageNavigator {
  public:
   // Opens a new URL inside the passed in TabContents, if source is 0 open
   // in the current front-most tab.
   virtual void OpenURLFromTab(TabContents* source,
-                              const GURL& url,
+                              const GURL& url, const GURL& referrer,
                               WindowOpenDisposition disposition,
                               PageTransition::Type transition) = 0;
 
-  virtual void OpenURL(const GURL& url,
+  virtual void OpenURL(const GURL& url, const GURL& referrer,
                        WindowOpenDisposition disposition,
                        PageTransition::Type transition)
   {
-    OpenURLFromTab(NULL, url, disposition, transition);
+    OpenURLFromTab(NULL, url, referrer, disposition, transition);
   }
 
   // Called to inform the delegate that the tab content's navigation state
   // changed. The |changed_flags| indicates the parts of the navigation state
   // that have been updated, and is any combination of the
   // |TabContents::InvalidateTypes| bits.
   virtual void NavigationStateChanged(const TabContents* source,
                                       unsigned changed_flags) = 0;
 
   // Called to cause the delegate to replace the source contents with the new
@@ skipping 106 matching lines @@
     *proceed_to_fire_unload = true;
   }
 
   // Send IPC to external host. Default implementation is do nothing.
   virtual void ForwardMessageToExternalHost(const std::string& receiver,
                                             const std::string& message) {};
 };
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_DELEGATE_H_