Bug 563864 - Add some debugging output to figure out what's going on with test_mozPaintCount.html intermittent oranges (temporary test-only change)

(transplanted from 9b29864cabd1b25cf5184d4f96ad75ff8ce99d4c)

--HG--
extra : transplant_source : %9B%29%86L%AB%D1%B2%5C%F5%18MO%96%ADu%FF%8C%E9%9DL

layout/base/tests/test_mozPaintCount.html

@@ -17,9 +17,11 @@
 SimpleTest.waitForExplicitFinish();
 
 var startPaintCount = window.mozPaintCount;
+ok(true, "Got to initial paint count: " + startPaintCount);
 var color = 0;
 
 function doFlicker() {
+  ok(true, "Iteration " + color + ", paint count: " + window.mozPaintCount);
   if (window.mozPaintCount - startPaintCount > 20) {
     ok(true, "Got enough paints");
     SimpleTest.finish();