Remove FOUC avoidance from BlockPainter and DeprecatedPaintLayerPainter.

Source/core/paint/BlockPainter.cpp

Index: Source/core/paint/BlockPainter.cpp
diff --git a/Source/core/paint/BlockPainter.cpp b/Source/core/paint/BlockPainter.cpp
index fa3bd8fdc40e0f87b703d8c4106853eab75b144f..90a4e69038ad3ce832b08c3c777e2b72c67f500c 100644
--- a/Source/core/paint/BlockPainter.cpp
+++ b/Source/core/paint/BlockPainter.cpp
@@ -290,12 +290,6 @@ bool BlockPainter::hasCaret() const
 
 void BlockPainter::paintContents(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
-    // Avoid painting descendants of the root element when stylesheets haven't loaded. This eliminates FOUC.
-    // It's ok not to draw, because later on, when all the stylesheets do load, styleResolverChanged() on the Document
-    // will do a full paint invalidation.
-    if (m_layoutBlock.document().didLayoutWithPendingStylesheets() && !m_layoutBlock.isLayoutView())
-        return;
-
     if (m_layoutBlock.childrenInline()) {
         LineBoxListPainter(*m_layoutBlock.lineBoxes()).paint(&m_layoutBlock, paintInfo, paintOffset);
     } else {