Add WebAuthn bindings and client interface.

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

Index: third_party/WebKit/Source/modules/webauth/AuthenticationAssertion.h
diff --git a/third_party/WebKit/Source/modules/webauth/AuthenticationAssertion.h b/third_party/WebKit/Source/modules/webauth/AuthenticationAssertion.h
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+++ b/third_party/WebKit/Source/modules/webauth/AuthenticationAssertion.h
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+// 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.
+
+#ifndef AuthenticationAssertion_h
+#define AuthenticationAssertion_h
+
+#include "bindings/core/v8/ScriptWrappable.h"
+#include "core/dom/DOMArrayBuffer.h"
+#include "modules/webauth/ScopedCredential.h"
+
+namespace blink {
+
+class AuthenticationAssertion final
+    : public GarbageCollectedFinalized<AuthenticationAssertion>,
+      public ScriptWrappable {
+  DEFINE_WRAPPERTYPEINFO();
+
+ public:
+  static AuthenticationAssertion* create(ScopedCredential* credential,
+                                         DOMArrayBuffer* clientData,
+                                         DOMArrayBuffer* authenticatorData,
+                                         DOMArrayBuffer* signature) {
+    return new AuthenticationAssertion(credential, clientData,
+                                       authenticatorData, signature);
+  }
+
+  AuthenticationAssertion(ScopedCredential* credential,
+                          DOMArrayBuffer* clientData,
+                          DOMArrayBuffer* authenticatorData,
+                          DOMArrayBuffer* signature)
+      : m_credential(credential),
+        m_clientData(clientData),
+        m_authenticatorData(authenticatorData),
+        m_signature(signature) {}
+
+  virtual ~AuthenticationAssertion() {}
+
+  ScopedCredential* credential() const { return m_credential.get(); }
+  DOMArrayBuffer* clientData() const { return m_clientData.get(); }
+  DOMArrayBuffer* authenticatorData() const {
+    return m_authenticatorData.get();
+  }
+  DOMArrayBuffer* signature() const { return m_signature.get(); }
+
+  DEFINE_INLINE_TRACE() {
+    visitor->trace(m_credential);
+    visitor->trace(m_clientData);
+    visitor->trace(m_authenticatorData);
+    visitor->trace(m_signature);
+  }
+
+ private:
+  const Member<ScopedCredential> m_credential;
+  const Member<DOMArrayBuffer> m_clientData;
+  const Member<DOMArrayBuffer> m_authenticatorData;
+  const Member<DOMArrayBuffer> m_signature;
+};
+
+}  // namespace blink
+
+#endif  // AuthenticationAssertion_h