Merge 106846 - Before accessing a frame's script controller in V8 bindings, first check that the ...

Source/WebCore/bindings/v8/ScheduledAction.cpp

 /*
  * Copyright (C) 2007-2009 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 78 matching lines @@
     }
 
     if (m_argc > 0)
         delete[] m_argv;
 }
 
 void ScheduledAction::execute(ScriptExecutionContext* context)
 {
     if (context->isDocument()) {
         Frame* frame = static_cast<Document*>(context)->frame();
+        if (!frame)
+            return;
         ScriptController* scriptController = frame->script();
         if (!scriptController->canExecuteScripts(NotAboutToExecuteScript))
             return;
         V8Proxy* proxy = V8Proxy::retrieve(frame);
         execute(proxy);
     }
 #if ENABLE(WORKERS)
     else {
         ASSERT(context->isWorkerContext());
         execute(static_cast<WorkerContext*>(context));
@@ skipping 38 matching lines @@
         v8::Handle<v8::Context> v8Context = v8::Local<v8::Context>::New(m_context.get());
         ASSERT(!v8Context.IsEmpty());
         v8::Context::Scope scope(v8Context);
         m_function->Call(v8Context->Global(), m_argc, m_argv);
     } else
         scriptController->evaluate(m_code);
 }
 #endif
 
 } // namespace WebCore