Google released the ChromeOS Dev channel update version 20.0.1116.0 (Platform version: 2199.0.0) for Chromebooks (Acer AC700, Samsung Series 5, and Cr-48).
This release in addition to functional, security and stability improvements contains Google Drive integrated into the ChromeOS file manager as well.
Adding support for Google Drive puts more emphasis on the file manager in ChromeOS. In the early days of ChromeOS, the file manager was more or less hidden from sight. Google now uses Aura, a hardware-accelerated window manager for ChromeOS, which allows you to open multiple browser windows and not just one window like before. ChromeOS now also features a Windows-like taskbar at the bottom of the screen.
The Google Drive integration is rather basic in this first release. "Drive currently appears as an additional folder in the ChromeOS file manager. While the file manager now features a column called "available offline." For now, Google Drive's advanced search features also aren't available through the file manager's interface.