Add an extra guard to replaceDocument()

Source/web/WebLocalFrameImpl.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 1785 matching lines @@
         return;
 
     String script = decodeURLEscapeSequences(url.string().substring(strlen("javascript:")));
     UserGestureIndicator gestureIndicator(DefinitelyProcessingNewUserGesture);
     v8::HandleScope handleScope(toIsolate(frame()));
     v8::Local<v8::Value> result = frame()->script().executeScriptInMainWorldAndReturnValue(ScriptSourceCode(script));
     if (result.IsEmpty() || !result->IsString())
         return;
     String scriptResult = toCoreString(v8::Handle<v8::String>::Cast(result));
     if (!frame()->navigationScheduler().locationChangePending())
-        frame()->document()->loader()->replaceDocument(scriptResult, ownerDocument.get());
+        frame()->loader().replaceDocumentWhileExecutingJavaScriptURL(scriptResult, ownerDocument.get());
 }
 
 void WebLocalFrameImpl::addStyleSheetByURL(const WebString& url)
 {
     RefPtrWillBeRawPtr<Element> styleElement = frame()->document()->createElement(HTMLNames::linkTag, false);
 
     styleElement->setAttribute(HTMLNames::typeAttr, "text/css");
     styleElement->setAttribute(HTMLNames::relAttr, "stylesheet");
     styleElement->setAttribute(HTMLNames::hrefAttr, url);
 
@@ skipping 50 matching lines @@
 
 void WebLocalFrameImpl::invalidateAll() const
 {
     ASSERT(frame() && frame()->view());
     FrameView* view = frame()->view();
     view->invalidateRect(view->frameRect());
     invalidateScrollbar();
 }
 
 } // namespace blink