CSS Colors: Test hsl() and hwb() with angle units

We add WPTs using deg, grad, rad and turn units with color functions.

Change-Id: Ib55ef4717be03b6ce353e4446be4e96d899232f7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3915706
Auto-Submit: Eric Willigers <ericwilligers@chromium.org>
Commit-Queue: Rune Lillesveen <futhark@chromium.org>
Reviewed-by: Rune Lillesveen <futhark@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1051129}

css/css-color/parsing/color-valid.html

@@ -84,6 +84,10 @@
 test_valid_value("color", "hwb(none 100% 50% / none)", "rgba(170, 170, 170, 0)");
 test_valid_value("color", "hwb(0 100% 50% / 0)", "rgba(170, 170, 170, 0)");
 
+test_valid_value("color", "hsl(72deg 22% 77%)", "rgb(204, 209, 183)");
+test_valid_value("color", "hwb(160grad 30% 17%)", "rgb(77, 212, 131)");
+test_valid_value("color", "hsl(3.77rad 43% 24%)", "rgb(35, 56, 88)");
+test_valid_value("color", "hwb(0.8turn 29% 6%)", "rgb(207, 74, 240)");
 
 for (const colorSpace of [ "srgb", "srgb-linear", "a98-rgb", "rec2020", "prophoto-rgb", "display-p3" ]) {
     test_valid_value("color", `color(${colorSpace} 0% 0% 0%)`, `color(${colorSpace} 0 0 0)`);