This test runs the WebGL Test listed below in an iframe and reports PASS or FAIL.

Test: ../../resources/webgl_test_files/conformance2/extensions/promoted-extensions-in-shaders.html
[ 1: FAIL ] [unexpected link status] ESSL 1.00 Fragment shader that requires GL_EXT_draw_buffers should not compile.
[ 2: FAIL ] [unexpected link status] ESSL 3.00 Fragment shader that requires GL_EXT_draw_buffers should not compile.
[ 3: FAIL ] should be green at (0, 0) expected: 0,255,0,255 was 255,0,0,255
[ 4: FAIL ] should be green at (0, 0) expected: 0,255,0,255 was 255,0,0,255
[ 5: FAIL ] [unexpected link status] ESSL 1.00 Fragment shader that requires GL_EXT_frag_depth should not compile.
[ 6: FAIL ] [unexpected link status] ESSL 3.00 Fragment shader that requires GL_EXT_frag_depth should not compile.
[ 7: FAIL ] should be green at (0, 0) expected: 0,255,0,255 was 255,0,0,255
[ 8: FAIL ] should be green at (0, 0) expected: 0,255,0,255 was 255,0,0,255
[ 9: FAIL ] [unexpected link status] ESSL 1.00 Fragment shader that requires GL_EXT_shader_texture_lod should not compile.
[ 10: FAIL ] [unexpected link status] ESSL 3.00 Fragment shader that requires GL_EXT_shader_texture_lod should not compile.
[ 11: FAIL ] should be green at (0, 0) expected: 0,255,0,255 was 255,0,0,255
[ 12: FAIL ] should be green at (0, 0) expected: 0,255,0,255 was 255,0,0,255
[ 13: FAIL ] [unexpected link status] ESSL 1.00 Fragment shader that requires GL_OES_standard_derivatives should not compile.
[ 14: FAIL ] [unexpected link status] ESSL 3.00 Fragment shader that requires GL_OES_standard_derivatives should not compile.
[ 15: FAIL ] should be green at (0, 0) expected: 0,255,0,255 was 255,0,0,255
[ 16: FAIL ] should be green at (0, 0) expected: 0,255,0,255 was 255,0,0,255
[ 17: PASS ] successfullyParsed is true
[ FAIL ] 16 failures reported