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

Test: ../../../../resources/webgl_test_files/deqp/functional/gles3/texturespecification/texsubimage2d_pbo_params.html
[ 1: FAIL ] specification.texsubimage2d_pbo.rgb8_offset_2d: Image comparison failed
[ 2: FAIL ] specification.texsubimage2d_pbo.rgb8_offset_2d: Verification failed
[ 3: FAIL ] specification.texsubimage2d_pbo.rgb8_offset_cube: Image comparison failed
[ 4: FAIL ] specification.texsubimage2d_pbo.rgb8_offset_cube: Verification failed
[ 5: FAIL ] specification.texsubimage2d_pbo.rgb8_alignment_2d: Image comparison failed
[ 6: FAIL ] specification.texsubimage2d_pbo.rgb8_alignment_2d: Verification failed
[ 7: FAIL ] specification.texsubimage2d_pbo.rgb8_alignment_cube: Image comparison failed
[ 8: FAIL ] specification.texsubimage2d_pbo.rgb8_alignment_cube: Verification failed
[ 9: FAIL ] specification.texsubimage2d_pbo.rgb8_row_length_2d: Image comparison failed
[ 10: FAIL ] specification.texsubimage2d_pbo.rgb8_row_length_2d: Verification failed
[ 11: FAIL ] specification.texsubimage2d_pbo.rgb8_row_length_cube: Image comparison failed
[ 12: FAIL ] specification.texsubimage2d_pbo.rgb8_row_length_cube: Verification failed
[ 13: FAIL ] specification.texsubimage2d_pbo.rgb8_skip_rows_2d: Image comparison failed
[ 14: FAIL ] specification.texsubimage2d_pbo.rgb8_skip_rows_2d: Verification failed
[ 15: FAIL ] specification.texsubimage2d_pbo.rgb8_skip_rows_cube: Image comparison failed
[ 16: FAIL ] specification.texsubimage2d_pbo.rgb8_skip_rows_cube: Verification failed
[ 17: FAIL ] specification.texsubimage2d_pbo.rgb8_skip_pixels_2d: Image comparison failed
[ 18: FAIL ] specification.texsubimage2d_pbo.rgb8_skip_pixels_2d: Verification failed
[ 19: FAIL ] specification.texsubimage2d_pbo.rgb8_skip_pixels_cube: Image comparison failed
[ 20: FAIL ] specification.texsubimage2d_pbo.rgb8_skip_pixels_cube: Verification failed
[ 21: PASS ] specification.texsubimage2d_pbo.rgb8_skip_pixels_cube: successfullyParsed is true
[ FAIL ] 20 failures reported