Bug 1567643: adding text-decoration-skip-ink: none to reftests r=dholbert

Browsers who already have text-decoration-skip-ink implemented will currently
fail [or spuriously pass] these tests because the feature is on by default and
the Ahem font is "ink-heavy", causing underlines and overlines to not show up
at all. The added text-decoration-skip-ink: none; line will ensure that an
underline or overline will be rendered whether or not skip-ink has been
implemented.

Differential Revision: https://phabricator.services.mozilla.com/D38949

--HG--
extra : moz-landing-system : lando

testing/web-platform/tests/css/css-text-decor/reference/text-decoration-thickness-001-notref.html

@@ -10,6 +10,7 @@
         }
         div span {
             text-decoration: green underline;
+            text-decoration-skip-ink: none;
             font: 20px/1 Ahem;
             color: transparent;
             padding-right: 1em;

testing/web-platform/tests/css/css-text-decor/reference/text-underline-offset-001-notref.html

@@ -10,6 +10,7 @@
         }
         div span {
             text-decoration: green underline;
+            text-decoration-skip-ink: none;
             font: 20px/1 Ahem;
             color: transparent;
             padding-bottom: 20px;

testing/web-platform/tests/css/css-text-decor/reference/text-underline-offset-002-ref.html

@@ -10,6 +10,7 @@
         }
         #text, #norm{
             text-decoration: green underline;
+            text-decoration-skip-ink: none;
             text-underline-offset: 0px;
             font: 20px/1 Ahem;
             color: transparent;

testing/web-platform/tests/css/css-text-decor/text-decoration-thickness-linethrough-001.html

@@ -18,6 +18,7 @@
             font: 20px/1 Ahem;
             color: transparent;
             text-decoration: green line-through;
+            text-decoration-skip-ink: none;
             /* We make the text decoration just a bit thicker than the div's height, so that
              * it will entirely cover the div's content-box (making it fully green) as long
              * as the line-through is approximately centered, vertically.

testing/web-platform/tests/css/css-text-decor/text-underline-offset-001.html

@@ -15,6 +15,7 @@
         }
         div span {
             text-decoration: green underline;
+            text-decoration-skip-ink: none;
             font: 20px/1 Ahem;
             color: transparent;
             padding-bottom: 20px;

testing/web-platform/tests/css/css-text-decor/text-underline-offset-002.html

@@ -14,6 +14,7 @@
         }
         #text, #norm{
             text-decoration: green underline;
+            text-decoration-skip-ink: none;
             font: 20px/1 Ahem;
             color: transparent;
             position: relative;