Upgrade to 1.0 and switch clients to dom-repeat where needed.

third_party/polymer/v0_8/components/iron-test-helpers/README.md

Index: third_party/polymer/v0_8/components/iron-test-helpers/README.md
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+# iron-test-helpers
+
+Utility classes to make testing easier.
+
+## Mock Interactions
+
+This is a set of methods to simulate mouse or keyboard interaction with an element. Include `mock-interactions.js` and then use them like so:
+
+```javascript
+test('can be triggered with space', function(done) {
+  button.addEventListener('keydown', function() {
+    done();
+  });
+  MockInteractions.pressSpace(button);
+});
+
+test('can be clicked', function(done) {
+  button.addEventListener('click', function() {
+    done();
+  });
+  MockInteractions.down(button);
+});
+```