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

Test: ../../../resources/webgl_test_files/deqp/functional/gles3/stringquery.html
[ 1: PASS ] string.renderer: Passed
[ 2: PASS ] string.vendor: Passed
[ 3: PASS ] string.version: Passed
[ 4: FAIL ] string.shading_language_version: Got invalid string prefix
[ 5: FAIL ] string.extensions: Advertised extension WEBKIT_EXT_texture_filter_anisotropic not found
[ 6: PASS ] successfullyParsed is true
[ FAIL ] 2 failures reported