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

Test: ../../../../resources/webgl_test_files/deqp/functional/gles3/textureshadow/cube_nearest_mipmap_linear_never.html
[ 1: FAIL ] texture_shadow.cube.nearest_mipmap_linear.never_depth_component16: Texture upload failed
[ 2: FAIL ] texture_shadow.cube.nearest_mipmap_linear.never_depth_component32f: Texture upload failed
[ 3: FAIL ] texture_shadow.cube.nearest_mipmap_linear.never_depth24_stencil8: Texture upload failed
[ 4: PASS ] successfullyParsed is true
[ FAIL ] 3 failures reported