Deprecate subscriptions to MediaStream ended event

third_party/WebKit/Source/modules/mediastream/MediaStream.cpp

Index: third_party/WebKit/Source/modules/mediastream/MediaStream.cpp
diff --git a/third_party/WebKit/Source/modules/mediastream/MediaStream.cpp b/third_party/WebKit/Source/modules/mediastream/MediaStream.cpp
index 24ef0ac0a7952429e517773fac4dffa481e622e2..fd3695aceb6702d7765f46d198d5138b6a5cfa65 100644
--- a/third_party/WebKit/Source/modules/mediastream/MediaStream.cpp
+++ b/third_party/WebKit/Source/modules/mediastream/MediaStream.cpp
@@ -27,6 +27,7 @@
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/dom/ExceptionCode.h"
+#include "core/frame/Deprecation.h"
 #include "modules/mediastream/MediaStreamRegistry.h"
 #include "modules/mediastream/MediaStreamTrackEvent.h"
 #include "platform/mediastream/MediaStreamCenter.h"
@@ -301,6 +302,14 @@ void MediaStream::streamEnded()
     }
 }
 
+bool MediaStream::addEventListenerInternal(const AtomicString& eventType, EventListener* listener, const AddEventListenerOptions& options)
+{
+    if (eventType == EventTypeNames::ended)
+        Deprecation::countDeprecation(getExecutionContext(), UseCounter::MediaStreamOnEnded);
+
+    return EventTargetWithInlineData::addEventListenerInternal(eventType, listener, options);
+}
+
 void MediaStream::contextDestroyed()
 {
     ContextLifecycleObserver::contextDestroyed();