Plumb the referrer throughout the OpenURL APIs....

webkit/glue/webview_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.
 
 // WebCore provides hooks for several kinds of functionality, allowing separate
 // classes termed "delegates" to receive notifications (in the form of direct
 // function calls) when certain events are about to occur or have just occurred.
 // In some cases, the delegate implements the needed functionality; in others,
 // the delegate has some control over the behavior but doesn't actually
 // implement it.  For example, the UI delegate is responsible for showing a
@@ skipping 115 matching lines @@
   }
 
   // This method is called when default plugin has been correctly created and
   // initialized, and found that the missing plugin is available to install or
   // user has started installation.
   virtual void OnMissingPluginStatus(WebPluginDelegate* delegate, int status) {
   }
 
   // This method is called to open a URL in the specified manner.
   virtual void OpenURL(WebView* webview, const GURL& url,
+                       const GURL& referrer,
                        WindowOpenDisposition disposition) {
   }
 
   // Notifies how many matches have been found so far, for a given request_id.
   // |final_update| specifies whether this is the last update (all frames have
   // completed scoping).
   virtual void ReportFindInPageMatchCount(int count, int request_id,
                                           bool final_update) {
   }
 
@@ skipping 575 matching lines @@
 
   WebViewDelegate() { }
   virtual ~WebViewDelegate() { }
 
  private:
   DISALLOW_EVIL_CONSTRUCTORS(WebViewDelegate);
 };
 
 #endif  // WEBKIT_GLUE_WEBVIEW_DELEGATE_H__