Verify that changing the size of an antialiased WebGL context does not cause it to stop working.

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".

TEST COMPLETE: 4 PASS, 1 FAIL

PASS gl = getWebGL(1, 1, { alpha: false, antialias: true }) is non-null.
PASS pixel[0] == 0 is true
FAIL pixel[0] == 255 should be true. Was false.
PASS pixel[0] == 0 is true
PASS successfullyParsed is true

TEST COMPLETE