Move RendererGL caps generation to renderergl_utils. Change-Id: Ia385fc9739174472d698367e2c6093ba1963b1fe Reviewed-on: https://chromium-review.googlesource.com/253634 Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>