Reland: Remove "needkey" event and add its replacement, "encrypted".

Source/modules/encryptedmedia/MediaEncryptedEvent.h

 /*
  * Copyright (C) 2012 Google Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef MediaKeyNeededEvent_h
-#define MediaKeyNeededEvent_h
+#ifndef MediaEncryptedEvent_h
+#define MediaEncryptedEvent_h
 
-#include "core/html/MediaKeyError.h"
 #include "modules/EventModules.h"
+#include "wtf/ArrayBuffer.h"
 
 namespace blink {
 
-struct MediaKeyNeededEventInit : public EventInit {
-    MediaKeyNeededEventInit();
+struct MediaEncryptedEventInit : public EventInit {
+    MediaEncryptedEventInit();
 
-    String contentType;
-    RefPtr<Uint8Array> initData;
+    String initDataType;
+    RefPtr<ArrayBuffer> initData;
 };
 
-class MediaKeyNeededEvent final : public Event {
+class MediaEncryptedEvent final : public Event {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    virtual ~MediaKeyNeededEvent();
+    virtual ~MediaEncryptedEvent();
 
-    static PassRefPtrWillBeRawPtr<MediaKeyNeededEvent> create()
+    static PassRefPtrWillBeRawPtr<MediaEncryptedEvent> create()
     {
-        return adoptRefWillBeNoop(new MediaKeyNeededEvent);
+        return adoptRefWillBeNoop(new MediaEncryptedEvent);
     }
 
-    static PassRefPtrWillBeRawPtr<MediaKeyNeededEvent> create(const AtomicString& type, const MediaKeyNeededEventInit& initializer)
+    static PassRefPtrWillBeRawPtr<MediaEncryptedEvent> create(const AtomicString& type, const MediaEncryptedEventInit& initializer)
     {
-        return adoptRefWillBeNoop(new MediaKeyNeededEvent(type, initializer));
+        return adoptRefWillBeNoop(new MediaEncryptedEvent(type, initializer));
     }
 
     virtual const AtomicString& interfaceName() const override;
 
-    String contentType() const { return m_contentType; }
-    Uint8Array* initData() const { return m_initData.get(); }
+    String initDataType() const { return m_initDataType; }
+    ArrayBuffer* initData() const { return m_initData.get(); }
 
     virtual void trace(Visitor*) override;
 
 private:
-    MediaKeyNeededEvent();
-    MediaKeyNeededEvent(const AtomicString& type, const MediaKeyNeededEventInit& initializer);
+    MediaEncryptedEvent();
+    MediaEncryptedEvent(const AtomicString& type, const MediaEncryptedEventInit& initializer);
 
-    String m_contentType;
-    RefPtr<Uint8Array> m_initData;
+    String m_initDataType;
+    RefPtr<ArrayBuffer> m_initData;
 };
 
 } // namespace blink
 
-#endif // MediaKeyNeededEvent_h
+#endif // MediaEncryptedEvent_h