Migrate WTF::HashSet::add() to ::insert() [part 1 of N]

third_party/WebKit/Source/core/xml/XPathNodeSet.cpp

Index: third_party/WebKit/Source/core/xml/XPathNodeSet.cpp
diff --git a/third_party/WebKit/Source/core/xml/XPathNodeSet.cpp b/third_party/WebKit/Source/core/xml/XPathNodeSet.cpp
index e0995346c85944a945e2234e7d8c649c45ea89a2..f2f56c0e16aee1aeb1916748066ec2599de4031d 100644
--- a/third_party/WebKit/Source/core/xml/XPathNodeSet.cpp
+++ b/third_party/WebKit/Source/core/xml/XPathNodeSet.cpp
@@ -127,7 +127,8 @@ static void sortBlock(unsigned from,
   // each group.
   HeapHashSet<Member<Node>> parentNodes;
   for (unsigned i = from; i < to; ++i)
-    parentNodes.add(parentWithDepth(commonAncestorDepth + 1, parentMatrix[i]));
+    parentNodes.insert(
+        parentWithDepth(commonAncestorDepth + 1, parentMatrix[i]));
 
   unsigned previousGroupEnd = from;
   unsigned groupEnd = from;
@@ -217,7 +218,7 @@ void NodeSet::traversalSort() const {
   DCHECK_GT(nodeCount, 1u);
   for (unsigned i = 0; i < nodeCount; ++i) {
     Node* node = m_nodes[i].get();
-    nodes.add(node);
+    nodes.insert(node);
     if (node->isAttributeNode())
       containsAttributeNodes = true;
   }