Add an ANGLE sample framework.

BUG=angle:521

Change-Id: If1fc6198dbbe44f0ade5539cff540e3e086f2a3b
Reviewed-on: https://chromium-review.googlesource.com/188722
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>
28 files changed