Chrome App Launcher for Linux

In Chrome 36, the app launcher also works in Linux. Now this feature is available for all major desktop operating systems: Windows, Mac OS, Chrome OS and Linux.

To add the app launcher icon, Google suggests to "search your computer for Chrome App Launcher and
pin it to your system's launcher or panel for easy access." You first need to enable the App Launcher by adding a Chrome app from this page.

Here's a screenshot from Ubuntu 14.04: