Have Frame::script() return a reference

Source/core/html/HTMLPlugInElement.cpp

 /**
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 106 matching lines @@
 SharedPersistent<v8::Object>* HTMLPlugInElement::pluginWrapper()
 {
     Frame* frame = document().frame();
     if (!frame)
         return 0;
 
     // If the host dynamically turns off JavaScript (or Java) we will still return
     // the cached allocated Bindings::Instance.  Not supporting this edge-case is OK.
     if (!m_pluginWrapper) {
         if (Widget* widget = pluginWidget())
-            m_pluginWrapper = frame->script()->createPluginWrapper(widget);
+            m_pluginWrapper = frame->script().createPluginWrapper(widget);
     }
     return m_pluginWrapper.get();
 }
 
 bool HTMLPlugInElement::dispatchBeforeLoadEvent(const String& sourceURL)
 {
     // FIXME: Our current plug-in loading design can't guarantee the following
     // assertion is true, since plug-in loading can be initiated during layout,
     // and synchronous layout can be initiated in a beforeload event handler!
     // See <http://webkit.org/b/71264>.
@@ skipping 102 matching lines @@
 
     if (useFallbackContent() || !renderer() || !renderer()->isEmbeddedObject())
         return false;
     return !toRenderEmbeddedObject(renderer())->showsUnavailablePluginIndicator();
 }
 
 NPObject* HTMLPlugInElement::getNPObject()
 {
     ASSERT(document().frame());
     if (!m_NPObject)
-        m_NPObject = document().frame()->script()->createScriptObjectForPluginElement(this);
+        m_NPObject = document().frame()->script().createScriptObjectForPluginElement(this);
     return m_NPObject;
 }
 
 bool HTMLPlugInElement::isImageType()
 {
     if (m_serviceType.isEmpty() && protocolIs(m_url, "data"))
         m_serviceType = mimeTypeFromDataURL(m_url);
 
     if (Frame* frame = document().frame()) {
         KURL completedURL = document().completeURL(m_url);
         return frame->loader()->client()->objectContentType(completedURL, m_serviceType, shouldPreferPlugInsForImages()) == ObjectContentImage;
     }
 
     return Image::supportsType(m_serviceType);
 }
 
 }