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 f5c16a1a367698d9dd5ffded0a5a7b7b0402b9e8..0b3bb78841bb1de6f1e00555c72339614dbd0426 100644
--- a/third_party/WebKit/Source/core/dom/ContainerNode.cpp
+++ b/third_party/WebKit/Source/core/dom/ContainerNode.cpp
@@ -1298,6 +1298,25 @@ void ContainerNode::recalcDescendantStyles(StyleRecalcChange change) {
   }
 }
 
+void ContainerNode::rebuildChildrenLayoutTrees() {
+  DCHECK(!needsStyleRecalc());
+  DCHECK(!needsReattachLayoutTree());
+
+  for (Node* child = lastChild(); child; child = child->previousSibling()) {
+    if (child->needsReattachLayoutTree() ||
+        child->childNeedsReattachLayoutTree()) {
+      if (child->isTextNode())
+        toText(child)->rebuildTextLayoutTree();
+      else if (child->isElementNode())
+        toElement(child)->rebuildLayoutTree();
+    }
+  }
+  // This is done in ContainerNode::attachLayoutTree but will never be cleared
+  // if we don't enter ContainerNode::attachLayoutTree so we do it here.
+  clearChildNeedsStyleRecalc();
+  clearChildNeedsReattachLayoutTree();
+}
+
 void ContainerNode::checkForSiblingStyleChanges(SiblingCheckType changeType,
                                                 Element* changedElement,
                                                 Node* nodeBeforeChange,