In Layout test, when the test is done, for the mismatch case (With -expected.png), the generated result will be a html file, and provide very friendly UI to compare the pixel differences.(Just like attachment  https://bugs.chromium.org/p/chromium/issues/detail?id=832537).

But for pixel_test the failed results look like:
Pixels do not match!
[19514:19514:0524/163902.063130:4497435460401:ERROR:pixel_test_utils.cc(80)] Actual: data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAMgAAADICAYAAACtWK6eAAAF00lEQVR4nO3d3W7TTBuG0bumEopQJU4LjhNxCDmxblRsAO...QmCC

[19514:19514:0524/163902.063162:4497435460433:ERROR:pixel_test_utils.cc(81)] Expected: data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAMgAAADICAIAAAAiOjnJAAAFfElEQVR4nO3d0UCRgkUnAIpOARSYBi0wCFpkELDIJWGQSsMgkYJFJwCKTgEUmAYtMAhaZBCwyCVhkErDIJGCRScAik4BFJgGLTAIWmQQsMglYZBKwyCRgkUnAIpP+A5yjj55FpLRxAAAAAElFTkSuQmCC
../../components/viz/service/display/renderer_pixeltest.cc:1205: Failure


Does it possible use the layout result tools in the pixel test?