Add a test to run the internal GLES2 conformance test suite

This adds a new test, graphics_GLES2ConformChrome, which runs the
Khronos GLES2 conformance test suite against the Chrome GPU command
buffer.

BUG=None
TEST=Add to autotest-chrome, build with internal_gles_conform USE flag,
     manually run with test_that, and evaluate output.

Change-Id: I5f73a2eb633cdacc6d6fd5da0ac102f01c72de23
Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Reviewed-on: https://chromium-review.googlesource.com/205726
Reviewed-by: Ilja Friedel <ihf@chromium.org>
2 files changed