Complete checked state announcements and clarify state usage

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 626 matching lines @@
         isChecked = !isChecked;
       });
     </script>
   */}, function(root) {
     var cbx = root.find({role: RoleType.checkBox});
     var click = cbx.doDefault.bind(cbx);
     var focus = cbx.focus.bind(cbx);
     mockFeedback.call(focus)
         .expectSpeech('go')
         .expectSpeech('Check box')
-        .expectSpeech('not checked')
+        .expectSpeech('Not checked')
         .call(click)
         .expectSpeech('go')
         .expectSpeech('Check box')
-        .expectSpeech('checked')
+        .expectSpeech('Checked')
         .call(click)
         .expectSpeech('go')
         .expectSpeech('Check box')
-        .expectSpeech('not checked')
+        .expectSpeech('Not checked')
         .replay();
   });
 });
 
 /** Tests navigating into and out of iframes using nextButton */
 TEST_F('BackgroundTest', 'ForwardNavigationThroughIframeButtons', function() {
   var mockFeedback = this.createMockFeedback();
 
   var running = false;
   var runTestIfIframeIsLoaded = function(rootNode) {
@@ skipping 503 matching lines @@
     <input type="text"></input>
   */}, function(root) {
     this.listenOnce(root, 'focus', function(e) {
       var focus = ChromeVoxState.instance.currentRange.start.node;
       assertEquals(RoleType.textField, focus.role);
       assertTrue(focus.state.focused);
     });
     doCmd('nextEditText')();
   });
 });