Hide call to removeDisplayTree in CueTimeline

Source/core/html/track/CueTimeline.cpp

Index: Source/core/html/track/CueTimeline.cpp
diff --git a/Source/core/html/track/CueTimeline.cpp b/Source/core/html/track/CueTimeline.cpp
index 141e1f3b9d5dcef5f218f1a92b54a74588494f6c..37aa29dd8becab1794d49154b02f3c4f2c645383 100644
--- a/Source/core/html/track/CueTimeline.cpp
+++ b/Source/core/html/track/CueTimeline.cpp
@@ -83,6 +83,12 @@ void CueTimeline::removeCueInternal(PassRefPtrWillBeRawPtr<TextTrackCue> cue)
     }
 }
 
+void CueTimeline::hideCues(TextTrack*, const TextTrackCueList* cues)
+{
+    for (size_t i = 0; i < cues->length(); ++i)
+        cues->item(i)->removeDisplayTree();
+}
+
 static bool trackIndexCompare(TextTrack* a, TextTrack* b)
 {
     return a->trackIndex() - b->trackIndex() < 0;