Untainted canvas:
PASS: Calling readPixels() from an untainted canvas was allowed.
PASS: Calling toDataURL() on an untainted canvas was allowed.


Tainted canvas:
PASS: Calling texImage2D() with an untainted image was allowed
PASS: Calling readPixels() from a canvas tainted by a remote image was allowed.
PASS: Calling toDataURL() on a canvas CORS-untainted by a remote image was allowed.
PASS: Calling texImage2D() with an untainted canvas was allowed
PASS: Calling readPixels() from a canvas tainted by a CORS-untained canvas was allowed.
PASS: Calling toDataURL() on a canvas CORS-untainted by a CORS-untained canvas was allowed.