Perf bots for https://codereview.chromium.org/2473743003

third_party/WebKit/Source/core/dom/Node.h

Index: third_party/WebKit/Source/core/dom/Node.h
diff --git a/third_party/WebKit/Source/core/dom/Node.h b/third_party/WebKit/Source/core/dom/Node.h
index 7b49709b72fed66830752e2af367ccdf69a08306..1a1012ecff552f254a0d28e9c3124ce4a61e51c4 100644
--- a/third_party/WebKit/Source/core/dom/Node.h
+++ b/third_party/WebKit/Source/core/dom/Node.h
@@ -394,7 +394,8 @@ class CORE_EXPORT Node : public EventTarget {
   }
 
   bool needsAttach() const {
-    return getStyleChangeType() == NeedsReattachStyleChange;
+    return getStyleChangeType() == NeedsReattachStyleChange ||
+           getFlag(NeedsReattachLayoutTree);
   }
   bool needsStyleRecalc() const {
     return getStyleChangeType() != NoStyleChange;
@@ -830,7 +831,9 @@ class CORE_EXPORT Node : public EventTarget {
     NeedsReattachLayoutTree = 1 << 26,
     ChildNeedsReattachLayoutTree = 1 << 27,
 
-    DefaultNodeFlags = IsFinishedParsingChildrenFlag | NeedsReattachStyleChange
+    DefaultNodeFlags = IsFinishedParsingChildrenFlag |
+                       NeedsReattachStyleChange |
+                       NeedsReattachLayoutTree
   };
 
   // 4 bits remaining.
@@ -853,8 +856,9 @@ class CORE_EXPORT Node : public EventTarget {
   enum ConstructionType {
     CreateOther = DefaultNodeFlags,
     CreateText = DefaultNodeFlags | IsTextFlag,
-    CreateContainer =
-        DefaultNodeFlags | ChildNeedsStyleRecalcFlag | IsContainerFlag,
+    CreateContainer = DefaultNodeFlags | ChildNeedsStyleRecalcFlag |
+                      ChildNeedsReattachLayoutTree |
+                      IsContainerFlag,
     CreateElement = CreateContainer | IsElementFlag,
     CreateShadowRoot =
         CreateContainer | IsDocumentFragmentFlag | IsInShadowTreeFlag,
@@ -978,6 +982,7 @@ inline void Node::lazyReattachIfAttached() {
 
   detachLayoutTree(context);
   markAncestorsWithChildNeedsStyleRecalc();
+  markAncestorsWithChildNeedsReattachLayoutTree();
 }
 
 inline bool Node::shouldCallRecalcStyle(StyleRecalcChange change) {