This patch intends to add platform detection to ANGLE and tighten
the driver bug workarounds on Intel GPU.

BUG=angleproject:1548

Change-Id: I1ea57e174f688a175da8b658de4337295037fcab
Reviewed-on: https://chromium-review.googlesource.com/399914
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>