Call Element::rebuildLayoutTree from Document::updateStyle directly

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 8725bf275c9008b7177b6b66618e33d8a940b2e8..23aafbd4a325c9e2cc31c1da7e178c7a78dce560 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;
@@ -829,7 +830,9 @@ class CORE_EXPORT Node : public EventTarget {
     NeedsReattachLayoutTree = 1 << 26,
     ChildNeedsReattachLayoutTree = 1 << 27,
 
-    DefaultNodeFlags = IsFinishedParsingChildrenFlag | NeedsReattachStyleChange
+    DefaultNodeFlags = IsFinishedParsingChildrenFlag |
+                       NeedsReattachStyleChange |
+                       NeedsReattachLayoutTree
   };
 
   // 4 bits remaining.