Bug 681192. Part 17: Disable test_transformed_scrolling_repaints_2.html on Mac. r=matspal

--HG--
extra : rebase_source : 6af0be8370c0e07e55954245f6a6305d04eb2a2b

layout/base/tests/chrome/test_transformed_scrolling_repaints_2.html

@@ -34,7 +34,11 @@ function startTest() {
         t.scrollTop = 33;
         waitForAllPaintsFlushed(function () {
           var painted = utils.checkAndClearPaintedState(e);
-          is(painted, false, "Fully-visible scrolled element should not have been painted");
+          if (navigator.platform.indexOf("Mac") >= 0) {
+            todo_is(painted, false, "Fully-visible scrolled element should not have been painted (disabled on Mac, see bug 753497)");
+          } else {
+            is(painted, false, "Fully-visible scrolled element should not have been painted");
+          }
           SimpleTest.finish();
         });
       });