Create Pepper-based CDM for EME WD (Blink changes)

Source/modules/encryptedmedia/MediaKeysController.h

+// 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 MediaKeysController_h
+#define MediaKeysController_h
+
+#include "core/page/Page.h"
+#include "wtf/PassOwnPtr.h"
+
+namespace WebCore {
+
+class MediaKeysClient;
+
+class MediaKeysController FINAL : public Supplement<Page> {
+public:
+    virtual ~MediaKeysController();
+    MediaKeysClient* client() const { return m_client; }
+
+    static PassOwnPtr<MediaKeysController> create(MediaKeysClient*);
+    static const char* supplementName();
+    static MediaKeysController* from(Page* page) { return static_cast<MediaKeysController*>(Supplement<Page>::from(page, supplementName())); }
+
+protected:
+    explicit MediaKeysController(MediaKeysClient*);
+
+private:
+    MediaKeysClient* m_client;
+};
+
+} // namespace WebCore
+
+#endif // MediaKeysController_h
+