Implement navigator.requestMediaKeySystemAccess()

Source/modules/encryptedmedia/MediaKeySystemAccess.h

Index: Source/modules/encryptedmedia/MediaKeySystemAccess.h
diff --git a/Source/modules/encryptedmedia/MediaKeySystemAccess.h b/Source/modules/encryptedmedia/MediaKeySystemAccess.h
new file mode 100644
index 0000000000000000000000000000000000000000..0f8e627b1cc2e5b08eedc1abd47455fb375aa6b0
--- /dev/null
+++ b/Source/modules/encryptedmedia/MediaKeySystemAccess.h
@@ -0,0 +1,32 @@
+// Copyright 2014 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 MediaKeySystemAccess_h
+#define MediaKeySystemAccess_h
+
+#include "bindings/core/v8/ScriptPromise.h"
+#include "bindings/core/v8/ScriptWrappable.h"
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+
+class MediaKeySystemAccess final : public GarbageCollectedFinalized<MediaKeySystemAccess>, public ScriptWrappable {
+    DEFINE_WRAPPERTYPEINFO();
+
+public:
+    explicit MediaKeySystemAccess(const String& keySystem);
+    virtual ~MediaKeySystemAccess();
+
+    const String& keySystem() const { return m_keySystem; }
+    ScriptPromise createMediaKeys(ScriptState*);
+
+    void trace(Visitor*);
+
+private:
+    const String m_keySystem;
+};
+
+} // namespace blink
+
+#endif // MediaKeySystemAccess_h