Blink-layer update to match WebAuthN spec

third_party/WebKit/Source/modules/webauth/PublicKeyCredential.cpp

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "modules/webauth/PublicKeyCredential.h"
+
+namespace blink {
+
+PublicKeyCredential* PublicKeyCredential::Create(
+    DOMArrayBuffer* raw_id,
+    AuthenticatorResponse* response) {
+  return new PublicKeyCredential(raw_id, response);
+}
+
+PublicKeyCredential::PublicKeyCredential(DOMArrayBuffer* raw_id,
+                                         AuthenticatorResponse* response)
+    : raw_id_(raw_id), response_(response) {}
+
+DEFINE_TRACE(PublicKeyCredential) {
+  visitor->Trace(raw_id_);
+  visitor->Trace(response_);
+}
+
+}  // namespace blink