[LayoutNG] WIP on storing layout output in the legacy tree for multicol.

third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp

Index: third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp b/third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp
index 69e8ef4926e9d1840e445324c309c5d2c23ed883..600656f197e4e4f3af29c125b877640be1353913 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp
@@ -4244,9 +4244,6 @@ LayoutMultiColumnFlowThread* LayoutBlockFlow::createMultiColumnFlowThread(
 
 void LayoutBlockFlow::createOrDestroyMultiColumnFlowThreadIfNeeded(
     const ComputedStyle* oldStyle) {
-  if (RuntimeEnabledFeatures::layoutNGEnabled())
-    return;
-
   // Paged overflow trumps multicol in this implementation. Ideally, it should
   // be possible to have both paged overflow and multicol on the same element,
   // but then we need two flow threads. Anyway, this is nothing to worry about