Collapse description into either value or name, and value into name if duplicated.

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

 // Copyright 2014 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 839 matching lines @@
         .call(doCmd('nextObject'))
         .expectSpeech('After2')
         .call(doCmd('previousObject'))
         .expectSpeech('After1')
         .call(doCmd('previousObject'))
         .expectSpeech('Before3');
 
     mockFeedback.replay();
   });
 });
+
+TEST_F('BackgroundTest', 'ButtonNameValueDescription', function() {
+  var mockFeedback = this.createMockFeedback();
+  this.runWithLoadedTree(function(root) {/*!
+    <input type="submit" aria-label="foo" value="foo"></input>
+  */}, function(root) {
+    var btn = root.find({role: RoleType.button});
+    mockFeedback.call(btn.focus.bind(btn))
+        .expectSpeech('foo')
+        .expectSpeech('Button')
+        .replay();
+  });
+});