Implement Node.treeRoot

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 405626d58eee2af4fcfb56cc1c1df90f662223e0..46bbcd9db1126f23e81abc55245fd594fa628904 100644
--- a/third_party/WebKit/Source/core/dom/Node.cpp
+++ b/third_party/WebKit/Source/core/dom/Node.cpp
@@ -450,6 +450,16 @@ Node* Node::pseudoAwareLastChild() const
     return lastChild();
 }
 
+Node* Node::treeRoot()
+{
+    if (this->inDocument() || this->isInShadowTree())

[kochi, 2016/01/28 06:46:11]

You can combine this 2 conditions into isInTreeScope()
(see the definition in Node.h).

And by default, you can omit 'this->' in a method.

[yuzuchan, 2016/02/01 04:59:54]

Done.

+        return &this->treeScope().rootNode();

[kochi, 2016/01/28 06:46:11]

You can omit 'this->'.

[yuzuchan, 2016/02/01 04:59:54]

Done.

+    Node* node = this;
+    while (node->parentNode())
+        node = node->parentNode();
+    return node;
+}
+
 PassRefPtrWillBeRawPtr<Node> Node::insertBefore(PassRefPtrWillBeRawPtr<Node> newChild, Node* refChild, ExceptionState& exceptionState)
 {
     if (isContainerNode())