Collection of prospective test flake fixes

Potentially related:
https://github.com/Polymer/web-component-tester/issues/505

Bug: Issue 5792
Change-Id: I9ab6e8e40d9811dd52906335426764c052907609

polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html

diff --git a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html
index 13ee10e..d62bdd8 100644
--- a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html
+++ b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html
@@ -18,10 +18,12 @@
 <meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes">
 <title>gr-api-interface</title>
 
-<script src="../../../bower_components/webcomponentsjs/webcomponents.min.js"></script>
+<script src="../../../bower_components/webcomponentsjs/webcomponents-lite.min.js"></script>
 <script src="../../../bower_components/web-component-tester/browser.js"></script>
 <link rel="import" href="gr-js-api-interface.html">
 
+<script>void(0);</script>
+
 <test-fixture id="basic">
   <template>
     <gr-js-api-interface></gr-js-api-interface>