Add WebAuthn bindings and client interface.

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

Index: third_party/WebKit/Source/modules/webauth/ScopedCredential.h
diff --git a/third_party/WebKit/Source/modules/webauth/ScopedCredential.h b/third_party/WebKit/Source/modules/webauth/ScopedCredential.h
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index 0000000000000000000000000000000000000000..6ca82980b1237e1b6475b85373392456525eaf99
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+++ b/third_party/WebKit/Source/modules/webauth/ScopedCredential.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 ScopedCredential_h
+#define ScopedCredential_h
+
+#include "bindings/core/v8/ScriptWrappable.h"
+#include "core/dom/DOMArrayBuffer.h"
+
+namespace blink {
+
+class ScopedCredentialType;
+
+class ScopedCredential final
+    : public GarbageCollectedFinalized<ScopedCredential>,
+      public ScriptWrappable {
+  DEFINE_WRAPPERTYPEINFO();
+
+ public:
+  enum class ScopedCredentialType { SCOPEDCRED };
+
+  static ScopedCredential* create(const ScopedCredentialType type,
+                                  DOMArrayBuffer* id) {
+    return new ScopedCredential(type, id);
+  }
+
+  ScopedCredential(const ScopedCredentialType type, DOMArrayBuffer* id)
+      : m_type(type), m_id(id) {}
+
+  virtual ~ScopedCredential() {}
+
+  String type() const {
+    DCHECK_EQ(m_type, ScopedCredentialType::SCOPEDCRED);
+    return "ScopedCred";
+  }
+
+  DOMArrayBuffer* id() const { return m_id.get(); }
+
+  ScopedCredentialType stringToCredentialType(const String& type) {
+    // There is currently only one type
+    return ScopedCredentialType::SCOPEDCRED;
+  }
+
+  DEFINE_INLINE_TRACE() { visitor->trace(m_id); }
+
+ private:
+  const ScopedCredentialType m_type;
+  const Member<DOMArrayBuffer> m_id;
+};
+
+}  // namespace blink
+
+#endif  // ScopedCredential_h