Enumerate the return value of dispatchEvent so it is clear.

third_party/WebKit/Source/core/html/track/TextTrackCue.cpp

Index: third_party/WebKit/Source/core/html/track/TextTrackCue.cpp
diff --git a/third_party/WebKit/Source/core/html/track/TextTrackCue.cpp b/third_party/WebKit/Source/core/html/track/TextTrackCue.cpp
index d1dd77dbb8d97bb21e859240f025dc3a59b4a380..b906a762ba5dd61c165e45cec64b66f5b1bc571a 100644
--- a/third_party/WebKit/Source/core/html/track/TextTrackCue.cpp
+++ b/third_party/WebKit/Source/core/html/track/TextTrackCue.cpp
@@ -136,11 +136,11 @@ unsigned TextTrackCue::cueIndex()
     return m_cueIndex;
 }
 
-bool TextTrackCue::dispatchEventInternal(PassRefPtrWillBeRawPtr<Event> event)
+DispatchEventResult TextTrackCue::dispatchEventInternal(PassRefPtrWillBeRawPtr<Event> event)
 {
     // When a TextTrack's mode is disabled: no cues are active, no events fired.
     if (!track() || track()->mode() == TextTrack::disabledKeyword())
-        return false;
+        return DispatchEventResult::CanceledBeforeDispatch;
 
     return EventTarget::dispatchEventInternal(event);
 }