invalidateColumnSets() doesn't need to mark anything for layout.

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

Index: third_party/WebKit/Source/core/layout/LayoutFlowThread.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutFlowThread.cpp b/third_party/WebKit/Source/core/layout/LayoutFlowThread.cpp
index 3c03acae7c334ce369a52180dab4085b3b2340e1..b42ccdb4801d97f37fb210900c2c1eb03573aea4 100644
--- a/third_party/WebKit/Source/core/layout/LayoutFlowThread.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutFlowThread.cpp
@@ -78,18 +78,6 @@ void LayoutFlowThread::removeColumnSetFromThread(
   m_multiColumnSetIntervalTree.clear();
 }
 
-void LayoutFlowThread::invalidateColumnSets() {
-  if (m_columnSetsInvalidated) {
-    ASSERT(selfNeedsLayout());
-    return;
-  }
-
-  setNeedsLayoutAndFullPaintInvalidation(
-      LayoutInvalidationReason::ColumnsChanged);
-
-  m_columnSetsInvalidated = true;
-}
-
 void LayoutFlowThread::validateColumnSets() {
   m_columnSetsInvalidated = false;
   // Called to get the maximum logical width for the columnSet.