Add WebAuthn bindings and client interface.

third_party/WebKit/Source/modules/webauth/WebAuthentication.h

Index: third_party/WebKit/Source/modules/webauth/WebAuthentication.h
diff --git a/third_party/WebKit/Source/modules/webauth/WebAuthentication.h b/third_party/WebKit/Source/modules/webauth/WebAuthentication.h
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+++ b/third_party/WebKit/Source/modules/webauth/WebAuthentication.h
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+// Copyright 2015 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.
+
+#ifndef WebAuthentication_h
+#define WebAuthentication_h
+
+#include "bindings/core/v8/ArrayBufferOrArrayBufferView.h"
+#include "bindings/core/v8/ScriptPromise.h"
+#include "bindings/core/v8/ScriptWrappable.h"
+#include "core/dom/DOMArrayBuffer.h"
+#include "modules/webauth/AuthenticationAssertionOptions.h"
+#include "modules/webauth/RelyingPartyAccount.h"
+#include "modules/webauth/ScopedCredentialOptions.h"
+#include "modules/webauth/ScopedCredentialParameters.h"
+
+namespace blink {
+
+class LocalFrame;
+class ScriptState;
+class RelyingPartyAccount;
+class AuthenticationAssertionOptions;
+class ScopedCredentialParameters;
+class ScopedCredentialOptions;
+
+typedef ArrayBufferOrArrayBufferView BufferSource;
+
+class WebAuthentication final
+    : public GarbageCollectedFinalized<WebAuthentication>,
+      public ScriptWrappable {
+  DEFINE_WRAPPERTYPEINFO();
+
+ public:
+  static WebAuthentication* create(LocalFrame& frame) {
+    return new WebAuthentication(frame);
+  }
+
+  virtual ~WebAuthentication();
+
+  void dispose();
+
+  ScriptPromise makeCredential(ScriptState*,
+                               const RelyingPartyAccount&,
+                               const HeapVector<ScopedCredentialParameters>,
+                               const BufferSource&,
+                               ScopedCredentialOptions&);
+  ScriptPromise getAssertion(ScriptState*,
+                             const BufferSource&,
+                             const AuthenticationAssertionOptions&);
+
+  DEFINE_INLINE_TRACE() {}
+
+ private:
+  explicit WebAuthentication(LocalFrame&);
+};
+
+}  // namespace blink
+
+#endif  // WebAuthentication_h