Implement rich editable line output

chrome/browser/resources/chromeos/chromevox/cvox2/background/editing_test.extjs

 // 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.
 
 // Include test fixture.
 GEN_INCLUDE(['../../testing/chromevox_next_e2e_test_base.js',
              '../../testing/assert_additions.js']);
 
 GEN_INCLUDE(['../../testing/mock_feedback.js']);
 
@@ skipping 193 matching lines @@
             can test</div></div>
     */},
     [
       {start: 0, end: 4, text: 'this'},
       {start: 5, end: 5, text: ''},
       {start: 6, end: 6, text: ''},
       {start: 7, end: 8, text: 'I'},
       {start: 9, end: 17, text: 'can test'},
     ]);
 });
+
+TEST_F('EditingTest', 'RichTextMoveByLine', function() {
+  editing.useRichText = true;
+  var mockFeedback = this.createMockFeedback();
+  this.runWithLoadedTree(function() {/*!
+    <div id="go" role="textbox" contenteditable>
+      <h2>hello</h2>
+      <div><br></div>
+      <p>This is a <a href="#test">test</a> of rich text</p>
+    </div>
+    <script>
+      var dir = 'forward';
+      var line = 0;
+      document.getElementById('go').addEventListener('click', function() {
+        var sel = getSelection();
+        sel.modify('move', dir, 'line');
+        if (dir == 'forward')
+          line++;
+        else
+          line--;
+
+        if (line == 0)
+          dir = 'forward';
+        if (line == 2)
+          dir = 'backward';
+      }, true);
+    </script>
+  */}, function(root) {
+    var input = root.find({role: RoleType.TEXT_FIELD});
+    var moveByLine = input.doDefault.bind(input);
+    mockFeedback.call(input.focus.bind(input))
+        .call(moveByLine)
+        .expectSpeech('blank')
+        .expectBraille('')
+        .call(moveByLine)
+        .expectSpeech('This is a ', 'test', 'Link', ' of rich text')
+        .expectBraille('This is a test lnk of rich text')
+        .call(moveByLine)
+        .expectSpeech('blank')
+        .expectBraille('')
+        .call(moveByLine)
+        .expectSpeech('hello', 'Heading 2')
+        .expectBraille('hello h2')
+        .replay();
+  });
+});