Have Frame::script() return a reference

Source/core/loader/FrameLoader.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008 Alp Toker <alp@atoker.com>
  * Copyright (C) Research In Motion Limited 2009. All rights reserved.
  * Copyright (C) 2011 Kris Jordan <krisjordan@gmail.com>
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ skipping 257 matching lines @@
 
     m_frame->editor().clear();
     m_frame->document()->cancelParsing();
     m_frame->document()->prepareForDestruction();
     m_frame->document()->removeFocusedElementOfSubtree(m_frame->document());
 
     // Do this after detaching the document so that the unload event works.
     if (options & ClearWindowProperties) {
         InspectorInstrumentation::frameWindowDiscarded(m_frame, m_frame->domWindow());
         m_frame->domWindow()->reset();
-        m_frame->script()->clearWindowShell();
+        m_frame->script().clearWindowShell();
     }
 
     m_frame->selection().prepareForDestruction();
     m_frame->eventHandler()->clear();
     if (m_frame->view())
         m_frame->view()->clear();
 
     if (options & ClearWindowObject) {
         // Do not drop the DOMWindow (and Document) before the ScriptController and view are cleared
         // as some destructors might still try to access the document.
         m_frame->setDOMWindow(0);
     }
 
     m_containsPlugins = false;
 
     if (options & ClearScriptObjects)
-        m_frame->script()->clearScriptObjects();
+        m_frame->script().clearScriptObjects();
 
-    m_frame->script()->enableEval();
+    m_frame->script().enableEval();
 
     m_frame->navigationScheduler()->clear();
 
     m_checkTimer.stop();
     m_shouldCallCheckCompleted = false;
 
     if (m_stateMachine.isDisplayingInitialEmptyDocument())
         m_stateMachine.advanceTo(FrameLoaderStateMachine::CommittedFirstRealLoad);
 }
 
@@ skipping 370 matching lines @@
     return FrameLoadTypeStandard;
 }
 
 bool FrameLoader::prepareRequestForThisFrame(FrameLoadRequest& request)
 {
     // If no SecurityOrigin was specified, skip security checks and assume the caller has fully initialized the FrameLoadRequest.
     if (!request.requester())
         return true;
 
     KURL url = request.resourceRequest().url();
-    if (m_frame->script()->executeScriptIfJavaScriptURL(url))
+    if (m_frame->script().executeScriptIfJavaScriptURL(url))
         return false;
 
     if (!request.requester()->canDisplay(url)) {
         reportLocalLoadFailed(m_frame, url.elidedString());
         return false;
     }
 
     if (request.requester() && !request.formState() && request.frameName().isEmpty())
         request.setFrameName(m_frame->document()->baseTarget());
 
@@ skipping 868 matching lines @@
     history()->setCurrentItem(currentItem.get());
 }
 
 void FrameLoader::dispatchDocumentElementAvailable()
 {
     m_client->documentElementAvailable();
 }
 
 void FrameLoader::dispatchDidClearWindowObjectsInAllWorlds()
 {
-    if (!m_frame->script()->canExecuteScripts(NotAboutToExecuteScript))
+    if (!m_frame->script().canExecuteScripts(NotAboutToExecuteScript))
         return;
 
     Vector<RefPtr<DOMWrapperWorld> > worlds;
     DOMWrapperWorld::getAllWorlds(worlds);
     for (size_t i = 0; i < worlds.size(); ++i)
         dispatchDidClearWindowObjectInWorld(worlds[i].get());
 }
 
 void FrameLoader::dispatchDidClearWindowObjectInWorld(DOMWrapperWorld* world)
 {
-    if (!m_frame->script()->canExecuteScripts(NotAboutToExecuteScript) || !m_frame->script()->existingWindowShell(world))
+    if (!m_frame->script().canExecuteScripts(NotAboutToExecuteScript) || !m_frame->script().existingWindowShell(world))
         return;
 
     m_client->dispatchDidClearWindowObjectInWorld(world);
 
     if (Page* page = m_frame->page())
         page->inspectorController().didClearWindowObjectInWorld(m_frame, world);
 
     InspectorInstrumentation::didClearWindowObjectInWorld(m_frame, world);
 }
 
 SandboxFlags FrameLoader::effectiveSandboxFlags() const
 {
     SandboxFlags flags = m_forcedSandboxFlags;
     if (Frame* parentFrame = m_frame->tree().parent())
         flags |= parentFrame->document()->sandboxFlags();
     if (HTMLFrameOwnerElement* ownerElement = m_frame->ownerElement())
         flags |= ownerElement->sandboxFlags();
     return flags;
 }
 
 } // namespace WebCore