Have Frame::script() return a reference

Source/bindings/v8/V8Binding.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 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 482 matching lines @@
     // did return |frame| we could get in trouble because the frame could be
     // navigated to another security origin.
     return 0;
 }
 
 v8::Local<v8::Context> toV8Context(ExecutionContext* context, DOMWrapperWorld* world)
 {
     if (context->isDocument()) {
         ASSERT(world);
         if (Frame* frame = toDocument(context)->frame())
-            return frame->script()->windowShell(world)->context();
+            return frame->script().windowShell(world)->context();
     } else if (context->isWorkerGlobalScope()) {
         ASSERT(!world);
         if (WorkerScriptController* script = toWorkerGlobalScope(context)->script())
             return script->context();
     }
     return v8::Local<v8::Context>();
 }
 
 bool handleOutOfMemory()
 {
     v8::Local<v8::Context> context = v8::Context::GetCurrent();
 
     if (!context->HasOutOfMemoryException())
         return false;
 
     // Warning, error, disable JS for this frame?
     Frame* frame = toFrameIfNotDetached(context);
     if (!frame)
         return true;
 
-    frame->script()->clearForOutOfMemory();
+    frame->script().clearForOutOfMemory();
     frame->loader()->client()->didExhaustMemoryAvailableForScript();
 
     if (Settings* settings = frame->settings())
         settings->setScriptEnabled(false);
 
     return true;
 }
 
 v8::Local<v8::Value> handleMaxRecursionDepthExceeded(v8::Isolate* isolate)
 {
@@ skipping 64 matching lines @@
 
 v8::Isolate* toIsolate(ExecutionContext* context)
 {
     if (context && context->isDocument())
         return mainThreadIsolate();
     return v8::Isolate::GetCurrent();
 }
 
 v8::Isolate* toIsolate(Frame* frame)
 {
-    return frame->script()->isolate();
+    return frame->script().isolate();
 }
 
 } // namespace WebCore