Add WebAuthn bindings and client interface.

third_party/WebKit/Source/modules/webauthentication/ClientData.idl

Index: third_party/WebKit/Source/modules/webauthentication/ClientData.idl
diff --git a/third_party/WebKit/Source/modules/webauthentication/ClientData.idl b/third_party/WebKit/Source/modules/webauthentication/ClientData.idl
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index 0000000000000000000000000000000000000000..a5393d2b3049e51241e58844ba357f96d6773a22
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+++ b/third_party/WebKit/Source/modules/webauthentication/ClientData.idl
@@ -0,0 +1,13 @@
+// Copyright 2016 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/#sec-client-data
+
+dictionary ClientData {

[esprehn, 2016/11/29 06:00:49]

This dictionary is too generically named. The spec needs to use more specific
names.

[kpaulhamus, 2016/12/20 19:17:00]

Tracking with https://github.com/w3c/webauthn/issues/312

+    required DOMString challenge;
+    required DOMString origin;
+    required AlgorithmIdentifier hashAlg;
+    DOMString tokenBinding;
+    WebAuthnExtensions extensions;
+};