<!-- Instructions: https://github.com/PolymerElements/iron-test-helpers/CONTRIBUTING.md#filing-issues --> ### Description <!-- Example: The `paper-foo` element causes the page to turn pink when clicked. --> ### Expected outcome <!-- Example: The page stays the same color. --> ### Actual outcome <!-- Example: The page turns pink. --> ### Live Demo <!-- Example: https://jsbin.com/cagaye/edit?html,output --> ### Steps to reproduce <!-- Example 1. Put a `paper-foo` element in the page. 2. Open the page in a web browser. 3. Click the `paper-foo` element. --> ### Browsers Affected <!-- Check all that apply --> - [ ] Chrome - [ ] Firefox - [ ] Safari 9 - [ ] Safari 8 - [ ] Safari 7 - [ ] Edge - [ ] IE 11 - [ ] IE 10
