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

Test: ../../resources/webgl_test_files/conformance2/context/constants-and-properties-2.html
[ 1: PASS ] All WebGL constants found to have correct values.
[ 2: PASS ] All constants removed from WebGL spec were absent from WebGL context.
[ 3: FAIL ] Also found the following extra properties:
[ 4: FAIL ] STENCIL_INDEX
[ 5: PASS ] successfullyParsed is true
[ FAIL ] 2 failures reported