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

Source/web/WebMediaPlayerClientImpl.cpp

Index: Source/web/WebMediaPlayerClientImpl.cpp
diff --git a/Source/web/WebMediaPlayerClientImpl.cpp b/Source/web/WebMediaPlayerClientImpl.cpp
index e326a2e30c029c7236e0957bc7e2f353dcb365f8..148aca483a590a9fda922392fab5a9f4a22bd1f0 100644
--- a/Source/web/WebMediaPlayerClientImpl.cpp
+++ b/Source/web/WebMediaPlayerClientImpl.cpp
@@ -11,7 +11,6 @@
 #include "core/rendering/RenderView.h"
 #include "core/rendering/compositing/RenderLayerCompositor.h"
 #include "modules/encryptedmedia/HTMLMediaElementEncryptedMedia.h"
-#include "modules/encryptedmedia/MediaKeyNeededEvent.h"
 #include "modules/mediastream/MediaStreamRegistry.h"
 #include "platform/audio/AudioBus.h"
 #include "platform/audio/AudioSourceProviderClient.h"
@@ -126,7 +125,12 @@ void WebMediaPlayerClientImpl::keyMessage(const WebString& keySystem, const WebS
 
 void WebMediaPlayerClientImpl::keyNeeded(const WebString& contentType, const unsigned char* initData, unsigned initDataLength)
 {
-    HTMLMediaElementEncryptedMedia::keyNeeded(mediaElement(), contentType, initData, initDataLength);
+    HTMLMediaElementEncryptedMedia::encrypted(mediaElement(), contentType, initData, initDataLength);
+}
+
+void WebMediaPlayerClientImpl::encrypted(const WebString& initDataType, const unsigned char* initData, unsigned initDataLength)
+{
+    HTMLMediaElementEncryptedMedia::encrypted(mediaElement(), initDataType, initData, initDataLength);
 }
 
 void WebMediaPlayerClientImpl::setWebLayer(WebLayer* layer)