Call Element::rebuildLayoutTree from Document::updateStyle directly

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

Index: third_party/WebKit/Source/core/dom/ContainerNode.cpp
diff --git a/third_party/WebKit/Source/core/dom/ContainerNode.cpp b/third_party/WebKit/Source/core/dom/ContainerNode.cpp
index 8e46d3dcbe026f9a26ed270f24ef6521456dc4b5..36f26a6f4b521a603af8da9c5399744e08274ed9 100644
--- a/third_party/WebKit/Source/core/dom/ContainerNode.cpp
+++ b/third_party/WebKit/Source/core/dom/ContainerNode.cpp
@@ -1297,6 +1297,23 @@ void ContainerNode::recalcDescendantStyles(StyleRecalcChange change) {
   }
 }
 
+void ContainerNode::rebuildChildrenLayoutTrees() {
+  DCHECK(!needsStyleRecalc());
+  DCHECK(!needsReattachLayoutTree());
+
+  for (Node* child = firstChild(); child; child = child->nextSibling()) {
+    if (child->needsReattachLayoutTree() ||
+        child->childNeedsReattachLayoutTree()) {
+      if (child->isTextNode())
+        toText(child)->rebuildTextLayoutTree();
+      else if (child->isElementNode())
+        toElement(child)->rebuildLayoutTree();
+    }
+  }
+  clearChildNeedsStyleRecalc();

[esprehn, 2016/12/14 04:30:47]

I don't think you need to clear this bit, it should be cleared already by the
reattach logic above if everything is working correctly.

[nainar, 2016/12/14 22:21:54]

Done.

+  clearChildNeedsReattachLayoutTree();
+}
+
 void ContainerNode::checkForSiblingStyleChanges(SiblingCheckType changeType,
                                                 Element* changedElement,
                                                 Node* nodeBeforeChange,