Remove FOUC avoidance from BlockPainter and DeprecatedPaintLayerPainter.

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 3363 matching lines @@
     if (!hasViewportUnits())
         return;
     ensureStyleResolver().notifyResizeForViewportUnits();
     setNeedsStyleRecalcForViewportUnits();
 }
 
 void Document::styleResolverChanged(StyleResolverUpdateMode updateMode)
 {
     styleEngine().resolverChanged(updateMode);
 
-    if (didLayoutWithPendingStylesheets() && !styleEngine().hasPendingSheets()) {
-        // We need to manually repaint because we avoid doing all repaints in layout or style
-        // recalc while sheets are still loading to avoid FOUC.
+    if (m_pendingSheetLayout == DidLayoutWithPendingSheets && !styleEngine().hasPendingSheets())
         m_pendingSheetLayout = IgnoreLayoutWithPendingSheets;
-
-        ASSERT(layoutView() || importsController());
-        if (layoutView())
-            layoutView()->invalidatePaintForViewAndCompositedLayers();
-    }
 }
 
 void Document::styleResolverMayHaveChanged()
 {
     styleResolverChanged(hasNodesWithPlaceholderStyle() ? FullStyleUpdate : AnalyzedStyleUpdate);
 }
 
 void Document::setHoverNode(PassRefPtrWillBeRawPtr<Node> newHoverNode)
 {
     m_hoverNode = newHoverNode;
@@ skipping 2369 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().string().utf8().data());
 }
 #endif