Predefine GL_FRAGMENT_PRECISION_HIGH. Bug 19331817 Change-Id: Ic0182a2413b6eee5343cde63f4655327bdc1d479 Reviewed-on: https://swiftshader-review.googlesource.com/2092 Reviewed-by: Nicolas Capens <capn@google.com> Tested-by: Nicolas Capens <capn@google.com>