Count usage of MediaStream active and inactive events

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 fd3695aceb6702d7765f46d198d5138b6a5cfa65..b1b1a1907ea0c009259e610b20cff6e45e7a9df3 100644
--- a/third_party/WebKit/Source/modules/mediastream/MediaStream.cpp
+++ b/third_party/WebKit/Source/modules/mediastream/MediaStream.cpp
@@ -306,6 +306,10 @@ bool MediaStream::addEventListenerInternal(const AtomicString& eventType, EventL
 {
     if (eventType == EventTypeNames::ended)
         Deprecation::countDeprecation(getExecutionContext(), UseCounter::MediaStreamOnEnded);
+    else if (eventType == EventTypeNames::active)
+        UseCounter::count(getExecutionContext(), UseCounter::MediaStreamOnActive);
+    else if (eventType == EventTypeNames::inactive)
+        UseCounter::count(getExecutionContext(), UseCounter::MediaStreamOnInactive);
 
     return EventTargetWithInlineData::addEventListenerInternal(eventType, listener, options);
 }