Tweak the TextTrackCue "cue index" management

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 2a699861dd2fcc1e9e0e29f3e0b54997820e92b6..8ebbd5025891b46b93cd812078b5cccb61527241 100644
--- a/Source/core/html/track/CueTimeline.cpp
+++ b/Source/core/html/track/CueTimeline.cpp
@@ -95,7 +95,7 @@ static bool eventTimeCueCompare(const std::pair<double, TextTrackCue*>& a, const
     // 12 - Further sort tasks in events that have the same time by the
     // relative text track cue order of the text track cues associated
     // with these tasks.
-    return a.second->cueIndex() - b.second->cueIndex() < 0;
+    return a.second->cueIndex() < b.second->cueIndex();
 }
 
 static PassRefPtrWillBeRawPtr<Event> createEventWithTarget(const AtomicString& eventName, PassRefPtrWillBeRawPtr<EventTarget> eventTarget)