Hoist cue "deactivation" out of TextTrackCueList::remove

Source/core/html/track/TextTrack.cpp

Index: Source/core/html/track/TextTrack.cpp
diff --git a/Source/core/html/track/TextTrack.cpp b/Source/core/html/track/TextTrack.cpp
index 54f2cbdec176b2a2c6a4aefe59f6fb5adc5abd34..c40516d26baf373122e959644fb373a4421b7e67 100644
--- a/Source/core/html/track/TextTrack.cpp
+++ b/Source/core/html/track/TextTrack.cpp
@@ -274,6 +274,9 @@ void TextTrack::removeCue(TextTrackCue* cue, ExceptionState& exceptionState)
         return;
     }
 
+    cue->setIsActive(false);
+    cue->removeDisplayTree();
+
     cue->setTrack(0);
     if (cueTimeline())
         cueTimeline()->removeCue(this, cue);