Blink-layer update to match WebAuthN spec

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

Index: third_party/WebKit/Source/modules/webauth/PublicKeyCredential.idl
diff --git a/third_party/WebKit/Source/modules/webauth/PublicKeyCredential.idl b/third_party/WebKit/Source/modules/webauth/PublicKeyCredential.idl
new file mode 100644
index 0000000000000000000000000000000000000000..c01477fea730d03a73e4b74f615cfabeebac8134
--- /dev/null
+++ b/third_party/WebKit/Source/modules/webauth/PublicKeyCredential.idl
@@ -0,0 +1,15 @@
+// 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.
+
+// https://w3c.github.io/webauthn/#publickeycredential
+
+[
+    RuntimeEnabled=WebAuth,
+    SecureContext,
+    Exposed=Window
+] interface PublicKeyCredential : Credential {
+    [SameObject] readonly attribute ArrayBuffer           rawId;
+    [SameObject] readonly attribute AuthenticatorResponse response;
+    // TODO(crbug.com/733033): Add extension support
+};