Bug 790938 - Add a test for SVG-in-OpenType glyphs in a mask. r=eflores

layout/reftests/text-svgglyphs/reftest.list

@@ -13,3 +13,4 @@ pref(gfx.font_rendering.opentype_svg.enabled,true)    == svg-glyph-objectopacity
 pref(gfx.font_rendering.opentype_svg.enabled,true)    == svg-glyph-paintnone.svg svg-glyph-paintnone-ref.svg
 pref(gfx.font_rendering.opentype_svg.enabled,true)    == svg-glyph-cachedopacity.svg svg-glyph-cachedopacity-ref.svg
 pref(gfx.font_rendering.opentype_svg.enabled,true)    == svg-glyph-objectvalue.svg svg-glyph-objectvalue-ref.svg
+pref(gfx.font_rendering.opentype_svg.enabled,true)    == svg-glyph-mask.svg svg-glyph-mask-ref.svg

layout/reftests/text-svgglyphs/svg-glyph-mask-ref.svg

@@ -0,0 +1,15 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <style>
+    @font-face {
+      font-family: "Liberation";
+      src: url(resources/svg.woff);
+    }
+  </style>
+  <mask id="m" x="0" y="0" width="200" height="200">
+    <rect x="30" y="60" width="80" height="80" stroke-width="5"
+      stroke="black" fill="red"/>
+    <rect x="30" y="50" width="10" height="10" stroke="none"
+      fill="turquoise" />
+  </mask>
+  <rect width="200" height="200" mask="url(#m)"/>
+</svg>

layout/reftests/text-svgglyphs/svg-glyph-mask.svg

@@ -0,0 +1,12 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <style>
+    @font-face {
+      font-family: "Liberation";
+      src: url(resources/svg.woff);
+    }
+  </style>
+  <mask id="m" x="0" y="0" width="200" height="200">
+    <text x="20" y="150" style="font: 100px Liberation">L</text>
+  </mask>
+  <rect width="200" height="200" mask="url(#m)"/>
+</svg>