Article in English: Tap the grey app with gears on it. You'll usually find Settings on the Home Screen. You'll find this option in the list of apps near the bottom of the Settings page. It's at the top of the Chrome page. Doing so will ensure that Google Chrome can access your phone's location while you're using the app, but not while the app is closed.

Summary in Vietnamese:
Mở Settings (Cài đặt) trên Iphone. Cuộn xuống và nhấn Chrome. Nhấn Location (Vị trí). Nhấn While Using the App (Trong khi sử dụng ứng dụng).