Add WebAuthn bindings and client interface.

third_party/WebKit/Source/modules/webauthentication/WebAuthentication.cpp

Index: third_party/WebKit/Source/modules/webauthentication/WebAuthentication.cpp
diff --git a/third_party/WebKit/Source/modules/webauthentication/WebAuthentication.cpp b/third_party/WebKit/Source/modules/webauthentication/WebAuthentication.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..f49c46773adb15623dc6f137ba9a5401bcada832
--- /dev/null
+++ b/third_party/WebKit/Source/modules/webauthentication/WebAuthentication.cpp
@@ -0,0 +1,35 @@
+// 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.
+
+#include "modules/webauthentication/WebAuthentication.h"
+
+#include "bindings/core/v8/ScriptPromise.h"
+
+namespace blink {
+
+WebAuthentication::WebAuthentication(LocalFrame& frame) {}
+
+WebAuthentication::~WebAuthentication() {}
+
+void WebAuthentication::dispose() {}
+
+ScriptPromise WebAuthentication::makeCredential(
+    ScriptState* scriptState,
+    const Account& accountInformation,
+    const HeapVector<ScopedCredentialParameters> cryptoParameters,
+    const BufferSource& attestationChallenge,
+    ScopedCredentialOptions& options) {
+  NOTREACHED();
+  return ScriptPromise();
+}
+
+ScriptPromise WebAuthentication::getAssertion(
+    ScriptState* scriptState,
+    const BufferSource& assertionChallenge,
+    const AssertionOptions& options) {
+  NOTREACHED();
+  return ScriptPromise();
+}
+
+}  // namespace blink