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

Source/modules/encryptedmedia/MediaKeysController.h

Index: Source/modules/encryptedmedia/MediaKeysController.h
diff --git a/Source/modules/encryptedmedia/MediaKeysController.h b/Source/modules/encryptedmedia/MediaKeysController.h
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--- /dev/null
+++ b/Source/modules/encryptedmedia/MediaKeysController.h
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+// 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 blink {
+class WebContentDecryptionModule;
+}
+
+namespace WebCore {
+
+class ExecutionContext;
+class MediaKeysClient;
+
+class MediaKeysController FINAL : public Supplement<Page> {
+public:
+    virtual ~MediaKeysController();
+
+    blink::WebContentDecryptionModule* createContentDecryptionModule(ExecutionContext*, const String& keySystem);
+
+    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
+