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

Test: ../../../../resources/webgl_test_files/deqp/functional/gles3/builtinprecision/modf.html
[ 1: FAIL ] precision.modf.lowp_vertex: bindBuffer
[ 2: FAIL ] precision.modf.lowp_fragment: 16154/16404 inputs failed.
[ 3: FAIL ] precision.modf.mediump_vertex: bindBuffer
[ 4: FAIL ] precision.modf.mediump_fragment: 16154/16404 inputs failed.
[ 5: FAIL ] precision.modf.highp_vertex: bindBuffer
[ 6: FAIL ] precision.modf.highp_fragment: 16154/16404 inputs failed.
[ 7: PASS ] precision.modf.highp_fragment: successfullyParsed is true
[ FAIL ] 6 failures reported