Have Frame::script() return a reference

Source/bindings/v8/V8WindowShell.cpp

 /*
  * Copyright (C) 2008, 2009, 2011 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 194 matching lines @@
 
     if (m_global.isEmpty()) {
         m_global.set(m_isolate, context->Global());
         if (m_global.isEmpty()) {
             disposeContext();
             return false;
         }
     }
 
     if (!isMainWorld) {
-        V8WindowShell* mainWindow = m_frame->script()->existingWindowShell(mainThreadNormalWorld());
+        V8WindowShell* mainWindow = m_frame->script().existingWindowShell(mainThreadNormalWorld());
         if (mainWindow && !mainWindow->context().IsEmpty())
-            setInjectedScriptContextDebugId(context, m_frame->script()->contextDebugId(mainWindow->context()));
+            setInjectedScriptContextDebugId(context, m_frame->script().contextDebugId(mainWindow->context()));
     }
 
     m_perContextData = V8PerContextData::create(context);
     if (!m_perContextData->init()) {
         disposeContext();
         return false;
     }
     m_perContextData->setActivityLogger(DOMWrapperWorld::activityLogger(m_world->worldId()));
     if (!installDOMWindow()) {
         disposeContext();
@@ skipping 274 matching lines @@
 void V8WindowShell::updateSecurityOrigin()
 {
     ASSERT(m_world->isMainWorld());
     if (m_context.isEmpty())
         return;
     v8::HandleScope handleScope(m_isolate);
     setSecurityToken();
 }
 
 } // WebCore