Use "int" instead of "long" for bindings where the WebIDL uses "long".

Source/core/html/track/TextTrackRegion.h

Index: Source/core/html/track/TextTrackRegion.h
diff --git a/Source/core/html/track/TextTrackRegion.h b/Source/core/html/track/TextTrackRegion.h
index 920a54b2330db8b0f2d042bfa1e71ecd3e882410..10af0d443921dc581786fc6f94ba96bee9d33683 100644
--- a/Source/core/html/track/TextTrackRegion.h
+++ b/Source/core/html/track/TextTrackRegion.h
@@ -63,8 +63,8 @@ public:
     double width() const { return m_width; }
     void setWidth(double, ExceptionCode&);
 
-    long height() const { return m_heightInLines; }
-    void setHeight(long, ExceptionCode&);
+    int height() const { return m_heightInLines; }
+    void setHeight(int, ExceptionCode&);
 
     double regionAnchorX() const { return m_regionAnchor.x(); }
     void setRegionAnchorX(double, ExceptionCode&);