Reject GLSL ES 3.00 shaders for OpenGL ES 2.0 contexts. Bug 19331817 Change-Id: I72128c6b3cb672d4b74578086814fde2c2c6db99 Reviewed-on: https://swiftshader-review.googlesource.com/2292 Reviewed-by: Nicolas Capens <capn@google.com> Tested-by: Nicolas Capens <capn@google.com>