Bug 1529571 - Use in rather than hasOwnProperty to check property…

… support r=heycam

This test is supposed to check CSS property support, but using
hasOwnProperty() is causing a lot of false positive because
hasOwnProperty() doesn't go up the proto chain even if the property
is actually supported.

Differential Revision: https://phabricator.services.mozilla.com/D35512

testing/web-platform/meta/svg/styling/required-properties.svg.ini

@@ -5,246 +5,14 @@
   [Property "baseline-shift" is supported]
     expected: FAIL
 
-  [Property "clip" is supported]
-    expected: FAIL
-
-  [Property "clip-path" is supported]
-    expected: FAIL
-
-  [Property "clip-rule" is supported]
-    expected: FAIL
-
-  [Property "color" is supported]
-    expected: FAIL
-
-  [Property "color-interpolation" is supported]
-    expected: FAIL
-
-  [Property "color-interpolation-filters" is supported]
-    expected: FAIL
-
   [Property "color-rendering" is supported]
     expected: FAIL
 
-  [Property "cursor" is supported]
-    expected: FAIL
-
-  [Property "direction" is supported]
-    expected: FAIL
-
-  [Property "display" is supported]
-    expected: FAIL
-
-  [Property "dominant-baseline" is supported]
-    expected: FAIL
-
-  [Property "fill" is supported]
-    expected: FAIL
-
-  [Property "fill-opacity" is supported]
-    expected: FAIL
-
-  [Property "fill-rule" is supported]
-    expected: FAIL
-
-  [Property "filter" is supported]
-    expected: FAIL
-
-  [Property "flood-color" is supported]
-    expected: FAIL
-
-  [Property "flood-opacity" is supported]
-    expected: FAIL
-
-  [Property "font" is supported]
-    expected: FAIL
-
-  [Property "font-family" is supported]
-    expected: FAIL
-
-  [Property "font-feature-settings" is supported]
-    expected: FAIL
-
-  [Property "font-kerning" is supported]
-    expected: FAIL
-
-  [Property "font-size" is supported]
-    expected: FAIL
-
-  [Property "font-size-adjust" is supported]
-    expected: FAIL
-
-  [Property "font-stretch" is supported]
-    expected: FAIL
-
-  [Property "font-style" is supported]
-    expected: FAIL
-
-  [Property "font-variant" is supported]
-    expected: FAIL
-
-  [Property "font-variant-caps" is supported]
-    expected: FAIL
-
-  [Property "font-variant-east-asian" is supported]
-    expected: FAIL
-
-  [Property "font-variant-ligatures" is supported]
-    expected: FAIL
-
-  [Property "font-variant-numeric" is supported]
-    expected: FAIL
-
-  [Property "font-variant-position" is supported]
-    expected: FAIL
-
-  [Property "font-weight" is supported]
-    expected: FAIL
-
   [Property "glyph-orientation-vertical" is supported]
     expected: FAIL
 
-  [Property "image-rendering" is supported]
-    expected: FAIL
-
-  [Property "isolation" is supported]
-    expected: FAIL
-
-  [Property "letter-spacing" is supported]
-    expected: FAIL
-
-  [Property "lighting-color" is supported]
-    expected: FAIL
-
-  [Property "line-height" is supported]
-    expected: FAIL
-
-  [Property "marker" is supported]
-    expected: FAIL
-
-  [Property "marker-end" is supported]
-    expected: FAIL
-
-  [Property "marker-mid" is supported]
-    expected: FAIL
-
-  [Property "marker-start" is supported]
-    expected: FAIL
-
-  [Property "mask" is supported]
-    expected: FAIL
-
-  [Property "opacity" is supported]
-    expected: FAIL
-
-  [Property "overflow" is supported]
-    expected: FAIL
-
-  [Property "paint-order" is supported]
-    expected: FAIL
-
-  [Property "pointer-events" is supported]
-    expected: FAIL
-
-  [Property "shape-rendering" is supported]
-    expected: FAIL
-
-  [Property "stop-color" is supported]
-    expected: FAIL
-
-  [Property "stop-opacity" is supported]
-    expected: FAIL
-
-  [Property "stroke" is supported]
-    expected: FAIL
-
-  [Property "stroke-dasharray" is supported]
-    expected: FAIL
-
-  [Property "stroke-dashoffset" is supported]
-    expected: FAIL
-
-  [Property "stroke-linecap" is supported]
-    expected: FAIL
-
-  [Property "stroke-linejoin" is supported]
-    expected: FAIL
-
-  [Property "stroke-miterlimit" is supported]
-    expected: FAIL
-
-  [Property "stroke-opacity" is supported]
-    expected: FAIL
-
-  [Property "stroke-width" is supported]
-    expected: FAIL
-
-  [Property "text-align" is supported]
-    expected: FAIL
-
   [Property "text-align-all" is supported]
     expected: FAIL
 
-  [Property "text-align-last" is supported]
-    expected: FAIL
-
-  [Property "text-anchor" is supported]
-    expected: FAIL
-
-  [Property "text-decoration" is supported]
-    expected: FAIL
-
-  [Property "text-decoration-color" is supported]
-    expected: FAIL
-
-  [Property "text-decoration-line" is supported]
-    expected: FAIL
-
-  [Property "text-decoration-style" is supported]
-    expected: FAIL
-
-  [Property "text-indent" is supported]
-    expected: FAIL
-
-  [Property "text-orientation" is supported]
-    expected: FAIL
-
-  [Property "text-overflow" is supported]
-    expected: FAIL
-
-  [Property "text-rendering" is supported]
-    expected: FAIL
-
   [Property "text-space-collapse" is supported]
     expected: FAIL
-
-  [Property "transform" is supported]
-    expected: FAIL
-
-  [Property "transform-box" is supported]
-    expected: FAIL
-
-  [Property "transform-origin" is supported]
-    expected: FAIL
-
-  [Property "unicode-bidi" is supported]
-    expected: FAIL
-
-  [Property "vector-effect" is supported]
-    expected: FAIL
-
-  [Property "vertical-align" is supported]
-    expected: FAIL
-
-  [Property "visibility" is supported]
-    expected: FAIL
-
-  [Property "white-space" is supported]
-    expected: FAIL
-
-  [Property "word-spacing" is supported]
-    expected: FAIL
-
-  [Property "writing-mode" is supported]
-    expected: FAIL
-