These tests check that PNG files containing an ICC profile in the `iCCP` chunk are displayed by applying the ICC profile to the image RGB data (as required by the CSS Color 4 specification) and not by just throwing the image data at the screen.
Images are in the support directory, as required by WPT.
Ensure that untagged images (assumed sRGB) are displayed the same as tagged images with an sRGB ICC profile or, equivalently, as images with an sRGB chunk.
If either test fails, don't bother with the remaining tests.
none yet