Bug 1249489 - covert css to device pixels in elm/test_canvas.html, r=yzen

accessible/tests/mochitest/elm/test_canvas.html

@@ -18,22 +18,26 @@
           src="../layout.js"></script>
 
   <script type="application/javascript">
+    var kX = 10, kY = 10, kWidth = 150, kHeight = 100;
     function doTest()
     {
       var canv = document.getElementById("c");
       var context = canv.getContext('2d');
       var element = document.getElementById("showA");
       context.beginPath();
-      context.rect(10, 10, 150, 100);
+      context.rect(kX, kY, kWidth, kHeight);
       context.addHitRegion({control: element});
-      var input = getAccessible("showA");
+
       var input = getAccessible("showA");
       var [cnvX, cnvY, cnvWidth, cnvHeight] = getBoundsForDOMElm(canv);
       var [accX, accY, accWidth, accHeight] = getBounds(input);
-      is(accX, cnvX + 10, "accX should be 10 and not " + accX);
-      is(accY, cnvY + 10, "accY should be 10 and not " + accY);
-      is(accWidth, 150, "accWidth should be 150 and not " + accWidth);
-      is(accHeight, 100, "accHeight should be 100 and not " + accHeight);
+
+      var [x, y, w, h] = CSSToDevicePixels(window, kX, kY, kWidth, kHeight);
+      is(accX, cnvX + x, "wrong accX");
+      is(accY, cnvY + y, "wrong accY");
+      is(accWidth, w, "wrong accWidth");
+      is(accHeight, h, "wrong accHeight");
+
       SimpleTest.finish();
     }