Bug 1747934 - Make marker-line-height pass reliably in all platforms.

The line height might be font-family-dependent.

MANUAL PUSH: Trivial orange fix CLOSED TREE

Author: emilio

testing/web-platform/tests/css/css-pseudo/marker-line-height-ref.html

@@ -3,6 +3,7 @@
 <title>CSS Reftest Reference</title>
 <link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com" />
 <style>
+::marker { font-family: inherit; }
 ol {
   float: left;
   width: 50px;

testing/web-platform/tests/css/css-pseudo/marker-line-height.html

@@ -7,6 +7,7 @@
 <link rel="match" href="marker-line-height-ref.html">
 <meta name="assert" content="Checks that ::marker supports 'line-height', both explicitly set or inherited from an ancestor">
 <style>
+::marker { font-family: inherit; }
 ol {
   float: left;
   width: 50px;