Chrome version: 61.0.3163.53 dev build
Chrome Platform version: 9765.32.0 dev channel caroline, sentry devices

Steps to reproduce:
1. Files app>Drive: Currently, quick view is supported only for images and video files.
2. Quick view support is not available for: 
   a) txt, pdfs, audio files.
   b) 'No preview available' display for unsupported types.

Expected Result:
Files app>Drive quick view support must be made available for various files types.