Migrate WTF::HashMap::add() to ::insert()

third_party/WebKit/Source/wtf/HashCountedSet.h

Index: third_party/WebKit/Source/wtf/HashCountedSet.h
diff --git a/third_party/WebKit/Source/wtf/HashCountedSet.h b/third_party/WebKit/Source/wtf/HashCountedSet.h
index 37b35c1c5605ed07d7048aede3424aa2dc2b27c5..4815a6e2b9f9490f4a2f31c11cb13ff0850158aa 100644
--- a/third_party/WebKit/Source/wtf/HashCountedSet.h
+++ b/third_party/WebKit/Source/wtf/HashCountedSet.h
@@ -118,7 +118,7 @@ template <typename T, typename U, typename V, typename W>
 inline typename HashCountedSet<T, U, V, W>::AddResult
 HashCountedSet<T, U, V, W>::add(const ValueType& value, unsigned count) {
   DCHECK_GT(count, 0u);
-  AddResult result = m_impl.add(value, 0);
+  AddResult result = m_impl.insert(value, 0);
   result.storedValue->value += count;
   return result;
 }