Simplify TextTrackCue::isActive

Source/core/html/track/TextTrackCue.h

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  * Copyright (C) 2012, 2013 Apple Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 59 matching lines @@
     bool pauseOnExit() const { return m_pauseOnExit; }
     void setPauseOnExit(bool);
 
     unsigned cueIndex();
     void updateCueIndex(unsigned cueIndex) { m_cueIndex = cueIndex; }
     void invalidateCueIndex();
 
     using EventTarget::dispatchEvent;
     virtual bool dispatchEvent(PassRefPtrWillBeRawPtr<Event>) override;
 
-    bool isActive();
+    bool isActive() const { return m_isActive; }
     void setIsActive(bool active) { m_isActive = active; }
 
     virtual void updateDisplay(HTMLDivElement& container) = 0;
 
     // FIXME: Consider refactoring to eliminate or merge the following three members.
     // https://code.google.com/p/chromium/issues/detail?id=322434
     virtual void updateDisplayTree(double movieTime) = 0;
 
     enum RemovalNotification {
         DontNotifyRegion,
@@ skipping 27 matching lines @@
 
     unsigned m_cueIndex;
 
     bool m_isActive : 1;
     bool m_pauseOnExit : 1;
 };
 
 } // namespace blink
 
 #endif // TextTrackCue_h