(into bug975211) Bug 975228 - Create logic to merge frecency-pages and Tiles (Tile equiv 1000 frecency)
additional metadata in PlacesProvider links
set directory links to empty in newtab browser tests by default, because tests currently depend on tiles to be empty
Replace imageURI with imageURISpec
add DirectoryLinksProvider in nsBrowserGlue
directoryLinksProvider end to end test