Properly suspend HTMLDocumentParser

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 148 matching lines @@
 
 void FrameLoader::setDefersLoading(bool defers)
 {
     if (m_documentLoader)
         m_documentLoader->setDefersLoading(defers);
     if (m_provisionalDocumentLoader)
         m_provisionalDocumentLoader->setDefersLoading(defers);
     if (m_policyDocumentLoader)
         m_policyDocumentLoader->setDefersLoading(defers);
 
+    if (Document* document = m_frame->document()) {
+        if (defers)
+            document->suspendScheduledTasks();
+        else
+            document->resumeScheduledTasks();
+    }
+
     if (!defers) {
         if (m_deferredHistoryLoad.isValid()) {
             loadHistoryItem(m_deferredHistoryLoad.m_item.get(), FrameLoadTypeBackForward,
                 m_deferredHistoryLoad.m_type, m_deferredHistoryLoad.m_cachePolicy);
             m_deferredHistoryLoad = DeferredHistoryLoad();
         }
         m_frame->navigationScheduler().startTimer();
         scheduleCheckCompleted();
     }
 }
@@ skipping 1277 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->owner())
         flags |= frameOwner->sandboxFlags();
     return flags;
 }
 
 } // namespace blink