Make appendChild/insertBefore faster with active ranges

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 d7f3ac0c07bc72120e077f48712cfacdb70a4443..2f7a45335c8c3922b46955a5755e994329ba536d 100644
--- a/third_party/WebKit/Source/core/dom/ContainerNode.cpp
+++ b/third_party/WebKit/Source/core/dom/ContainerNode.cpp
@@ -772,10 +772,18 @@ void ContainerNode::detach(const AttachContext& context)
     Node::detach(context);
 }
 
+bool ContainerNode::shouldNotUpdateRangesAfterChildrenChanged(const ChildrenChange& change)
+{
+    return change.byParser
+        || change.type == TextChanged
+        || change.type == ElementInserted
+        || change.type == NonElementInserted;
+}
+
 void ContainerNode::childrenChanged(const ChildrenChange& change)
 {
     document().incDOMTreeVersion();
-    if (!change.byParser && change.type != TextChanged)
+    if (!shouldNotUpdateRangesAfterChildrenChanged(change))
         document().updateRangesAfterChildrenChanged(this);
     invalidateNodeListCachesInAncestors();
     if (change.isChildInsertion() && !childNeedsStyleRecalc()) {