getComputedStyle() should return used value for 'line-height'

third_party/WebKit/LayoutTests/fast/css/getComputedStyle/resources/computed-style-listing.js

 function listGetComputedStyle(target) {
     // These properties have platform dependent values so we ignore them for convenience.
     var excludedProperties = new Set([
         '-webkit-tap-highlight-color',
         'font-family',
+        'line-height'
     ]);
     var properties = [
         // These properties don't show up when iterating a computed style object so we add them explicitly.
         "-webkit-mask-position-x",
         "-webkit-mask-position-y",
         "background-position-x",
         "background-position-y",
         "border-spacing",
         "overflow",
     ];
     var style = getComputedStyle(target);
     for (var i = 0; i < style.length; i++) {
         var property = style.item(i);
         if (!excludedProperties.has(property))
             properties.push(property);
     }
     for (var property of properties.sort())
         debug(property + ': ' + style[property]);
 }