Update web-platform-tests to revision 3bfdeb8976fc51748935c8d1f1014dfba8e08dfb

tests/wpt/web-platform-tests/visual-viewport/viewport-scrollbars-cause-resize.html

@@ -15,6 +15,8 @@
         scrollbars will cause a resize event to be fired at window.visualViewport.
     </h4>
     <script>
+      setup({ explicit_done: true });
+
       function runTest() {
         var scrollbarThickness = calculateScrollbarThickness();
 
@@ -59,7 +61,13 @@
 
       // Run the test after load to make sure any resize from a previous test
       // doesn't interfere.
-      window.onload = runTest;
+      window.onload = function() {
+        try {
+          runTest();
+        } finally {
+          done();
+        }
+      };
     </script>
     <div id="log"></div>
     </body>