Have Frame::script() return a reference

Source/web/WebPluginContainerImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 403 matching lines @@
 
 void WebPluginContainerImpl::allowScriptObjects()
 {
 }
 
 void WebPluginContainerImpl::clearScriptObjects()
 {
     Frame* frame = m_element->document().frame();
     if (!frame)
         return;
-    frame->script()->cleanupScriptObjectsForPlugin(this);
+    frame->script().cleanupScriptObjectsForPlugin(this);
 }
 
 NPObject* WebPluginContainerImpl::scriptableObjectForElement()
 {
     return m_element->getNPObject();
 }
 
 WebString WebPluginContainerImpl::executeScriptURL(const WebURL& url, bool popupsAllowed)
 {
     Frame* frame = m_element->document().frame();
     if (!frame)
         return WebString();
 
     const KURL& kurl = url;
     ASSERT(kurl.protocolIs("javascript"));
 
     String script = decodeURLEscapeSequences(
         kurl.string().substring(strlen("javascript:")));
 
     UserGestureIndicator gestureIndicator(popupsAllowed ? DefinitelyProcessingNewUserGesture : PossiblyProcessingUserGesture);
-    ScriptValue result = frame->script()->executeScriptInMainWorldAndReturnValue(ScriptSourceCode(script));
+    ScriptValue result = frame->script().executeScriptInMainWorldAndReturnValue(ScriptSourceCode(script));
 
     // Failure is reported as a null string.
     String resultStr;
     result.getString(resultStr);
     return resultStr;
 }
 
 void WebPluginContainerImpl::loadFrameRequest(const WebURLRequest& request, const WebString& target, bool notifyNeeded, void* notifyData)
 {
     Frame* frame = m_element->document().frame();
@@ skipping 435 matching lines @@
         // Take our element and get the clip rect from the enclosing layer and
         // frame view.
         clipRect.intersect(
             m_element->document().view()->windowClipRectForFrameOwner(m_element, true));
     }
 
     return clipRect;
 }
 
 } // namespace WebKit