Have Frame::script() return a reference

Source/core/frame/Navigator.cpp

 /*
  *  Copyright (C) 2000 Harri Porten (porten@kde.org)
  *  Copyright (c) 2000 Daniel Molkentin (molkentin@kde.org)
  *  Copyright (c) 2000 Stefan Schimanski (schimmi@kde.org)
  *  Copyright (C) 2003, 2004, 2005, 2006 Apple Computer, Inc.
  *  Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Lesser General Public
  *  License as published by the Free Software Foundation; either
@@ skipping 47 matching lines @@
 Navigator::~Navigator()
 {
 }
 
 // If this function returns true, we need to hide the substring "4." that would otherwise
 // appear in the appVersion string. This is to avoid problems with old versions of a
 // library called OpenCube QuickMenu, which as of this writing is still being used on
 // sites such as nwa.com -- the library thinks Safari is Netscape 4 if we don't do this!
 static bool shouldHideFourDot(Frame* frame)
 {
-    const String* sourceURL = frame->script()->sourceURL();
+    const String* sourceURL = frame->script().sourceURL();
     if (!sourceURL)
         return false;
     if (!(sourceURL->endsWith("/dqm_script.js") || sourceURL->endsWith("/dqm_loader.js") || sourceURL->endsWith("/tdqm_loader.js")))
         return false;
     Settings* settings = frame->settings();
     if (!settings)
         return false;
     return settings->needsSiteSpecificQuirks();
 }
 
@@ skipping 75 matching lines @@
 
     return true;
 }
 
 void Navigator::getStorageUpdates()
 {
     // FIXME: Remove this method or rename to yieldForStorageUpdates.
 }
 
 } // namespace WebCore