Update MediaKeySession events to match latest EME spec

Source/modules/encryptedmedia/MediaKeySession.cpp

Index: Source/modules/encryptedmedia/MediaKeySession.cpp
diff --git a/Source/modules/encryptedmedia/MediaKeySession.cpp b/Source/modules/encryptedmedia/MediaKeySession.cpp
index 0760ee356b0780ba0127f132c6ea8d9771a48813..b7dcac448a0d14429bdfaede557bc8c5a804ec7b 100644
--- a/Source/modules/encryptedmedia/MediaKeySession.cpp
+++ b/Source/modules/encryptedmedia/MediaKeySession.cpp
@@ -145,13 +145,6 @@ void MediaKeySession::addKeyTimerFired(Timer<MediaKeySession>*)
     }
 }
 
-void MediaKeySession::keyAdded()
-{
-    RefPtr<Event> event = Event::create(EventTypeNames::webkitkeyadded);
-    event->setTarget(this);
-    m_asyncEventQueue->enqueueEvent(event.release());
-}
-
 // Queue a task to fire a simple event named keyadded at the MediaKeySession object.
 void MediaKeySession::keyError(MediaKeyErrorCode errorCode, unsigned long systemCode)
 {
@@ -172,7 +165,7 @@ void MediaKeySession::keyError(MediaKeyErrorCode errorCode, unsigned long system
     m_error = MediaKeyError::create(mediaKeyErrorCode, systemCode);
 
     // 3. queue a task to fire a simple event named keyerror at the MediaKeySession object.
-    RefPtr<Event> event = Event::create(EventTypeNames::webkitkeyerror);
+    RefPtr<Event> event = Event::create(EventTypeNames::error);
     event->setTarget(this);
     m_asyncEventQueue->enqueueEvent(event.release());
 }
@@ -186,7 +179,21 @@ void MediaKeySession::keyMessage(const unsigned char* message, size_t messageLen
     init.message = Uint8Array::create(message, messageLength);
     init.destinationURL = destinationURL;
 
-    RefPtr<MediaKeyMessageEvent> event = MediaKeyMessageEvent::create(EventTypeNames::webkitkeymessage, init);
+    RefPtr<MediaKeyMessageEvent> event = MediaKeyMessageEvent::create(EventTypeNames::message, init);
+    event->setTarget(this);
+    m_asyncEventQueue->enqueueEvent(event.release());
+}
+
+void MediaKeySession::keyReady()
+{
+    RefPtr<Event> event = Event::create(EventTypeNames::ready);
+    event->setTarget(this);
+    m_asyncEventQueue->enqueueEvent(event.release());
+}
+
+void MediaKeySession::keyClosed()
+{
+    RefPtr<Event> event = Event::create(EventTypeNames::closed);
     event->setTarget(this);
     m_asyncEventQueue->enqueueEvent(event.release());
 }