Do not commit: Revert of r404081 and r402757 for perf testing purposes.

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 3e3b807a83a7e0f02d8427f97ae027b641d4512f..cd3f4b74c14cba266132e0cab300f1b0ea9baa3a 100644
--- a/third_party/WebKit/Source/core/dom/Node.cpp
+++ b/third_party/WebKit/Source/core/dom/Node.cpp
@@ -584,25 +584,6 @@ Node& Node::shadowIncludingRoot() const
     return *root;
 }
 
-bool Node::isUnclosedNodeOf(const Node& other) const
-{
-    if (!isInShadowTree() || treeScope() == other.treeScope())
-        return true;
-
-    const TreeScope* scope = &treeScope();
-    for (; scope->parentTreeScope(); scope = scope->parentTreeScope()) {
-        const ContainerNode& root = scope->rootNode();
-        if (root.isShadowRoot() && !toShadowRoot(root).isOpenOrV0())
-            break;
-    }
-
-    for (TreeScope* otherScope = &other.treeScope(); otherScope; otherScope = otherScope->parentTreeScope()) {
-        if (otherScope == scope)
-            return true;
-    }
-    return false;
-}
-
 bool Node::needsDistributionRecalc() const
 {
     return shadowIncludingRoot().childNeedsDistributionRecalc();