Using customTitle for topLevelFolder
Using customTitle for topLevelFolder

Auditors: @bbondy

Test Plan:
1. Import bookmarks from one browser without merging into bookmarks
toolbar
2. Import bookmarks from another browser without merging into bookmarks
toolbar
3. Both folder should coexist

pmkary/braver,jonathansampson/browser-laptop,dcposch/browser-laptop,jonathansampson/browser-laptop,diasdavid/browser-laptop,darkdh/browser-laptop,willy-b/browser-laptop,timborden/browser-laptop,jonathansampson/browser-laptop,luixxiul/browser-laptop,pmkary/braver,dcposch/browser-laptop,darkdh/browser-laptop,dcposch/browser-laptop,Sh1d0w/browser-laptop,willy-b/browser-laptop,timborden/browser-laptop,diasdavid/browser-laptop,willy-b/browser-laptop,luixxiul/browser-laptop,timborden/browser-laptop,willy-b/browser-laptop,luixxiul/browser-laptop,timborden/browser-laptop,Sh1d0w/browser-laptop,Sh1d0w/browser-laptop,dcposch/browser-laptop,darkdh/browser-laptop,diasdavid/browser-laptop,pmkary/braver,Sh1d0w/browser-laptop,diasdavid/browser-laptop,pmkary/braver,darkdh/browser-laptop,luixxiul/browser-laptop,jonathansampson/browser-laptop