Revert of Remove FOUC avoidance from BlockPainter and DeprecatedPaintLayerPainter.

Source/core/dom/Document.h

Index: Source/core/dom/Document.h
diff --git a/Source/core/dom/Document.h b/Source/core/dom/Document.h
index 02757df1e2fe174d2f8f67fdf8d0f15f12252eed..1fab51beca126f03979377b4c4108ad6739c5cf2 100644
--- a/Source/core/dom/Document.h
+++ b/Source/core/dom/Document.h
@@ -801,6 +801,7 @@
     enum PendingSheetLayout { NoLayoutWithPendingSheets, DidLayoutWithPendingSheets, IgnoreLayoutWithPendingSheets };
 
     bool didLayoutWithPendingStylesheets() const { return m_pendingSheetLayout == DidLayoutWithPendingSheets; }
+    bool ignoreLayoutWithPendingStylesheets() const { return m_pendingSheetLayout == IgnoreLayoutWithPendingSheets; }
 
     bool hasNodesWithPlaceholderStyle() const { return m_hasNodesWithPlaceholderStyle; }
     void setHasNodesWithPlaceholderStyle() { m_hasNodesWithPlaceholderStyle = true; }