Revert of Remove FOUC avoidance from BlockPainter and DeprecatedPaintLayerPainter.

Source/core/testing/Internals.cpp

Index: Source/core/testing/Internals.cpp
diff --git a/Source/core/testing/Internals.cpp b/Source/core/testing/Internals.cpp
index ce62f4a329c13a6f53a2f767245f399abb2f281c..0a6641fdf09337d55b31ccab92d422252251dbb5 100644
--- a/Source/core/testing/Internals.cpp
+++ b/Source/core/testing/Internals.cpp
@@ -2334,6 +2334,12 @@
     frame()->page()->focusController().setInitialFocus(reverse ? WebFocusTypeBackward : WebFocusTypeForward);
 }
 
+bool Internals::ignoreLayoutWithPendingStylesheets(Document* document)
+{
+    ASSERT(document);
+    return document->ignoreLayoutWithPendingStylesheets();
+}
+
 void Internals::setNetworkStateNotifierTestOnly(bool testOnly)
 {
     networkStateNotifier().setTestUpdatesOnly(testOnly);