Do not block painting for in-body CSS

third_party/WebKit/Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 3053 matching lines @@
         // For non-HTML there is no body so resume as soon as the sheets are loaded.
         beginLifecycleUpdatesIfRenderingReady();
     }
 
     if (m_gotoAnchorNeededAfterStylesheetsLoad && view())
         view()->processUrlFragment(m_url);
 }
 
 void Document::executeScriptsWaitingForResources()
 {
-    if (!isRenderingReady())
+    if (!isScriptExecutionReady())
         return;
     if (ScriptableDocumentParser* parser = scriptableDocumentParser())
         parser->executeScriptsWaitingForResources();
 }
 
 CSSStyleSheet& Document::elementSheet()
 {
     if (!m_elemSheet)
         m_elemSheet = CSSStyleSheet::createInline(this, m_baseURL);
     return *m_elemSheet;
@@ skipping 2585 matching lines @@
             nodesToAddToChain[i]->setHovered(true);
         }
     }
 }
 
 bool Document::haveStylesheetsLoaded() const
 {
     return m_styleEngine->haveStylesheetsLoaded();
 }
 
+bool Document::haveRenderBlockingStylesheetsLoaded() const
+{
+    if (RuntimeEnabledFeatures::cssInBodyDoesNotBlockPaintEnabled())
+        return m_styleEngine->haveRenderBlockingStylesheetsLoaded();
+    return m_styleEngine->haveStylesheetsLoaded();
+}
+
 Locale& Document::getCachedLocale(const AtomicString& locale)
 {
     AtomicString localeKey = locale;
     if (locale.isEmpty() || !RuntimeEnabledFeatures::langAttributeAwareFormControlUIEnabled())
         return Locale::defaultLocale();
     LocaleIdentifierToLocaleMap::AddResult result = m_localeCache.add(localeKey, nullptr);
     if (result.isNewEntry)
         result.storedValue->value = Locale::create(localeKey);
     return *(result.storedValue->value);
 }
@@ skipping 315 matching lines @@
 #ifndef NDEBUG
 using namespace blink;
 void showLiveDocumentInstances()
 {
     Document::WeakDocumentSet& set = Document::liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().getString().utf8().data());
 }
 #endif