Bug 996657 - Simplify top sites cursor by introducing row types (r=wesj)
Bug 996657 - Change TopSitesCursorWrapper to be a Cursor (r=wesj)
Bug 996657 - Store pinned sites cursor and fetch values from it (r=wesj)
Bug 996657 - Streamline schema for TopSitesCursorWrapper (r=wesj)
Bug 996657 - Factor out code to update cursor positions (r=wesj)
Bug 996657 - Factor out code to check valid cursor positions (r=wesj)
Bug 997660 - Rename variable to better match its semantics (r=wesj)
Bug 997660 - Remove unused methods from TopSitesGridItemView (r=wesj)
Bug 997660 - Remove unnecessary cursor checks in bindView (r=wesj)
Bug 997660 - Use TopSites.TYPE* in top sites grid UI (r=wesj)