[Media Router] First Run Flow WebUI and strings.

chrome/test/data/webui/media_router/media_router_container_tests.js

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /** @fileoverview Suite of tests for media-router-container. */
 cr.define('media_router_container', function() {
   function registerTests() {
     suite('MediaRouterContainer', function() {
       /**
        * Media Router Container created before each test.
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         fakeNonBlockingIssue = new media_router.Issue(
             'issue id 2', 'Issue Title 2', 'Issue Message 2', 0, 1,
             'route id 2', false, 1234);
 
         container.castModeList = fakeCastModeList;
 
         // Allow for the media router container to be created and attached.
         setTimeout(done);
       });
 
+      // Tests for 'acknowledge-first-run-flow' event firing when the
+      // 'first-run-button' button is clicked.
+      test('first run button click', function(done) {
+        container.showFirstRunFlow_ = true;
+
+        setTimeout(function() {
+          container.addEventListener('acknowledge-first-run-flow', function() {
+            done();
+          });
+          MockInteractions.tap(container.shadowRoot.getElementById(
+              'first-run-button'));
+        });
+      });
+
       // Tests for 'create-route' event firing when a sink with no associated
       // route is clicked.
       test('select sink without a route', function(done) {
         container.allSinks = fakeSinkList;
 
         setTimeout(function() {
           var sinkList =
               container.$['sink-list'].querySelectorAll('paper-item');
           container.addEventListener('create-route', function(data) {
             // Container is initially in auto mode since a cast mode has not
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           });
         });
       });
     });
   }
 
   return {
     registerTests: registerTests,
   };
 });