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

Test: ../../resources/webgl_test_files/conformance2/rendering/blitframebuffer-stencil-only.html
[ 1: PASS ] WebGL context exists
[ 2: PASS ] getError was expected value: NO_ERROR : after program initialization
[ 3: PASS ] gl.getProgramParameter(program, gl.LINK_STATUS) is true
[ 4: PASS ] getError was expected value: NO_ERROR : query uniform location
[ 5: PASS ] colorLoc is non-null.
[ 6: PASS ] getError was expected value: NO_ERROR : after buffer init
[ 7: PASS ] gl.checkFramebufferStatus(gl.FRAMEBUFFER) is gl.FRAMEBUFFER_COMPLETE
[ 8: PASS ] getError was expected value: NO_ERROR : after buffer init
[ 9: PASS ] gl.checkFramebufferStatus(gl.FRAMEBUFFER) is gl.FRAMEBUFFER_COMPLETE
[ 10: PASS ] getError was expected value: NO_ERROR : after drawQuad
[ 11: PASS ] getError was expected value: NO_ERROR : after drawQuad
[ 12: PASS ] getError was expected value: NO_ERROR : after drawQuad
[ 13: PASS ] getError was expected value: NO_ERROR : after drawQuad
[ 14: PASS ] getError was expected value: NO_ERROR : after test
[ 15: FAIL ] stencil test should be green at (0, 0) expected: 0,255,0,255 was 255,0,0,255
[ 16: PASS ] getError was expected value: NO_ERROR : after buffer init
[ 17: PASS ] gl.checkFramebufferStatus(gl.FRAMEBUFFER) is gl.FRAMEBUFFER_COMPLETE
[ 18: PASS ] getError was expected value: NO_ERROR : after buffer init
[ 19: PASS ] gl.checkFramebufferStatus(gl.FRAMEBUFFER) is gl.FRAMEBUFFER_COMPLETE
[ 20: PASS ] getError was expected value: NO_ERROR : after drawQuad
[ 21: PASS ] getError was expected value: NO_ERROR : after drawQuad
[ 22: PASS ] getError was expected value: NO_ERROR : after drawQuad
[ 23: PASS ] getError was expected value: NO_ERROR : after drawQuad
[ 24: PASS ] getError was expected value: NO_ERROR : after test
[ 25: FAIL ] stencil test should be green at (0, 0) expected: 0,255,0,255 was 255,0,0,255
[ 26: PASS ] successfullyParsed is true
[ FAIL ] 2 failures reported