Simplify HTMLMediaElement::textTrackModeChanged

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..bd9076360484d3b41f1fe89464e06d50ecae20ea 100644
--- a/Source/core/html/track/TextTrack.cpp
+++ b/Source/core/html/track/TextTrack.cpp
@@ -180,6 +180,11 @@ void TextTrack::setMode(const AtomicString& mode)
 
     m_mode = mode;
 
+    if (mode != disabledKeyword() && readinessState() == Loaded) {

[philipj_slow, 2015/02/25 15:52:14]

This was just copied, but is there any reason ReadinessState Loading isn't
included here? AFAICT there isn't anything that would add any missed cues later.

[fs, 2015/02/25 16:26:11]

If Loading, then cues will make their way to the track via the loader and arrive
via addListOfCues.

+        if (m_cues && cueTimeline())
+            cueTimeline()->addCues(this, m_cues.get());
+    }
+
     if (mediaElement())
         mediaElement()->textTrackModeChanged(this);
 }