fix l10n of stopButton
fix l10n of stopButton

fix #4548

Auditors: @bsclifton

Test Plan:
1. Go to "https://upload.wikimedia.org/wikipedia/commons/d/d9/Der_Kaufmann_Georg_Gisze_%28Hans_Holbein_the_Younger%29.jpg"
2. Hover over the stop loading 'x'

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