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

Source/modules/encryptedmedia/MediaEncryptedEvent.h

Index: Source/modules/encryptedmedia/MediaEncryptedEvent.h
diff --git a/Source/modules/encryptedmedia/MediaKeyNeededEvent.h b/Source/modules/encryptedmedia/MediaEncryptedEvent.h
similarity index 62%
rename from Source/modules/encryptedmedia/MediaKeyNeededEvent.h
rename to Source/modules/encryptedmedia/MediaEncryptedEvent.h
index a7b03b9fd3993e7d2c0fcd0b4b1de51e109a023f..719199df255c9a2610d38d7d7a004b3e796a4598 100644
--- a/Source/modules/encryptedmedia/MediaKeyNeededEvent.h
+++ b/Source/modules/encryptedmedia/MediaEncryptedEvent.h
@@ -23,51 +23,51 @@
  * 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