chrome-gnome-shell software package provides GNOME Shell integration for Chromium browser, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install chrome-gnome-shell
chrome-gnome-shell is installed in your system.
Make ensure the chrome-gnome-shell package were installed using the commands given below,
$ sudo dpkg-query -l | grep chrome-gnome-shell *
You will get with chrome-gnome-shell package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | GNOME |
| Package | chrome-gnome-shell |
| Version | 7.1-1 |
| Description | GNOME Shell integration for Chromium browser |
| Sub Section | gnome |