- (void)_scrollToContentOffset:(WebCore::FloatPoint)contentOffset;
- (BOOL)_scrollToRect:(WebCore::FloatRect)targetRect origin:(WebCore::FloatPoint)origin minimumScrollDistance:(float)minimumScrollDistance;
+- (void)_scrollByOffset:(WebCore::FloatPoint)offset;
- (void)_zoomToFocusRect:(WebCore::FloatRect)focusedElementRect selectionRect:(WebCore::FloatRect)selectionRectInDocumentCoordinates fontSize:(float)fontSize minimumScale:(double)minimumScale maximumScale:(double)maximumScale allowScaling:(BOOL)allowScaling forceScroll:(BOOL)forceScroll;
- (BOOL)_zoomToRect:(WebCore::FloatRect)targetRect withOrigin:(WebCore::FloatPoint)origin fitEntireRect:(BOOL)fitEntireRect minimumScale:(double)minimumScale maximumScale:(double)maximumScale minimumScrollDistance:(float)minimumScrollDistance;
- (void)_zoomOutWithOrigin:(WebCore::FloatPoint)origin animated:(BOOL)animated;