Call Element::rebuildLayoutTree from Document::updateStyle directly

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

Index: third_party/WebKit/Source/core/dom/Node.cpp
diff --git a/third_party/WebKit/Source/core/dom/Node.cpp b/third_party/WebKit/Source/core/dom/Node.cpp
index 8983f821c4c68e0a9ee2ade29d6467b4f949a659..308d7258e8e3ede67bdf34079f177d693a81c09e 100644
--- a/third_party/WebKit/Source/core/dom/Node.cpp
+++ b/third_party/WebKit/Source/core/dom/Node.cpp
@@ -892,6 +892,8 @@ Node* Node::commonAncestor(const Node& other,
 }
 
 void Node::reattachLayoutTree(const AttachContext& context) {
+  DCHECK(!needsStyleRecalc());
+  DCHECK(!childNeedsStyleRecalc());
   AttachContext reattachContext(context);
   reattachContext.performingReattach = true;
 
@@ -910,6 +912,9 @@ void Node::attachLayoutTree(const AttachContext&) {
          (layoutObject()->style() &&
           (layoutObject()->parent() || layoutObject()->isLayoutView())));
 
+  // Only doing this to cater to the comment in
+  // Document::updateStyleAndLayoutTree() right above the call to
+  // Document::updateStyle().
   clearNeedsStyleRecalc();
   clearNeedsReattachLayoutTree();