To run OpenGL ES 2.0 conformance tests, do the following:
(These require access to Google-internal sources.)
1. Generate build files:
   [GYP]
     "python build/gyp_chromium gpu/gles2_conform_support/gles2_conform_test.gyp"
     or set "GYP_DEFINES=internal_gles2_conform_tests=1" and rebuild your
     projects using your standard method. Example:
     "GYP_DEFINES=internal_gles2_conform_tests=1 gclient runhooks"
   [GN]
     "gn args out/gn" and add the config
     "internal_gles2_conform_tests = true"
2. Build any of the two targets:
   - gles2_conform_test_angle which tests ANGLE
   - gles2_conform_test_native which tests command-buffer service
   - gles2_conform_test_windowless which tests command-buffer service on most platforms
   - gles2_conform_test_pepper will be added later
3. Run the targets as: "<path to>gles2_conform_test_native -noimagefileio
   -run=<path to>third_party\gles2_conform\GTF_ES\glsl\GTF\mustpass.run"