Add a RefPtr<Frame> for child in FrameLoader::checkLoadCompleteForThisFrame

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 930 matching lines @@
         return false;
     return true;
 }
 
 bool FrameLoader::checkLoadCompleteForThisFrame()
 {
     ASSERT(client()->hasWebView());
     RefPtr<LocalFrame> protect(m_frame);
 
     bool allChildrenAreDoneLoading = true;
-    for (Frame* child = m_frame->tree().firstChild(); child; child = child->tree().nextSibling()) {
+    for (RefPtr<Frame> child = m_frame->tree().firstChild(); child; child = child->tree().nextSibling()) {
         if (child->isLocalFrame())
-            allChildrenAreDoneLoading &= toLocalFrame(child)->loader().checkLoadCompleteForThisFrame();
+            allChildrenAreDoneLoading &= toLocalFrame(child.get())->loader().checkLoadCompleteForThisFrame();
     }
 
     if (m_state == FrameStateProvisional && m_provisionalDocumentLoader) {
         const ResourceError& error = m_provisionalDocumentLoader->mainDocumentError();
         if (error.isNull())
             return false;
         RefPtr<DocumentLoader> loader = m_provisionalDocumentLoader;
         client()->dispatchDidFailProvisionalLoad(error);
         if (loader != m_provisionalDocumentLoader)
             return false;
@@ skipping 501 matching lines @@
     // FIXME: We need a way to propagate sandbox flags to out-of-process frames.
     Frame* parentFrame = m_frame->tree().parent();
     if (parentFrame && parentFrame->isLocalFrame())
         flags |= toLocalFrame(parentFrame)->document()->sandboxFlags();
     if (FrameOwner* frameOwner = m_frame->ownerElement())
         flags |= frameOwner->sandboxFlags();
     return flags;
 }
 
 } // namespace WebCore