Remove TextTrackCue::notifyRegionWhenRemovingDisplayTree

Source/core/html/track/TextTrackCue.h

Index: Source/core/html/track/TextTrackCue.h
diff --git a/Source/core/html/track/TextTrackCue.h b/Source/core/html/track/TextTrackCue.h
index bc559bf6c1bbbffb601f32aa5e98ef3cdf5eeb2c..398a965d2b04ea0186d290b5e937d228f14eb782 100644
--- a/Source/core/html/track/TextTrackCue.h
+++ b/Source/core/html/track/TextTrackCue.h
@@ -77,15 +77,19 @@ public:
     virtual bool dispatchEvent(PassRefPtrWillBeRawPtr<Event>) override;
 
     bool isActive();
-    void setIsActive(bool);
+    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;
-    virtual void removeDisplayTree() = 0;
-    virtual void notifyRegionWhenRemovingDisplayTree(bool notifyRegion) = 0;
+
+    enum RemovalNotification {
+        DontNotifyRegion,
+        NotifyRegion
+    };
+    virtual void removeDisplayTree(RemovalNotification = NotifyRegion) = 0;
 
     virtual const AtomicString& interfaceName() const override;