Context now holds it's own Caps, Extensions and TextureFormat caps so that it can modify them based on client version or work-arounds. BUG=angle:658 Change-Id: Id71b6c89b7aa36e1f3dc42b0e4720eaed1851fb9 Reviewed-on: https://chromium-review.googlesource.com/206480Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>
