Support Windows/Linux-style forward delete feedback

chrome/browser/resources/chromeos/chromevox/common/editable_text_test.unitjs

 // 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_unittest_base.js']);
 
 /**
  * A TTS class implementing speak and stop methods intended only for testing.
  * @constructor
@@ skipping 208 matching lines @@
   obj.changed(new cvox.TextChangeEvent('Hello, Wor', 10, 10));
   assertEqualStringArrays(['.', 'd', 'l'], tts.get());
 
   // Forward-delete
   obj.changed(new cvox.TextChangeEvent('Hello, Wor', 9, 9));
   obj.changed(new cvox.TextChangeEvent('Hello, Wor', 8, 8));
   obj.changed(new cvox.TextChangeEvent('Hello, Wor', 7, 7));
   obj.changed(new cvox.TextChangeEvent('Hello, or', 7, 7));
   obj.changed(new cvox.TextChangeEvent('Hello, r', 7, 7));
   obj.changed(new cvox.TextChangeEvent('Hello, ', 7, 7));
-  assertEqualStringArrays(['r', 'o', 'W', 'W', 'o', 'r'], tts.get());
+  assertEqualStringArrays(['r', 'o', 'W', 'o', 'r'], tts.get());
 
   // Clear all
   obj.changed(new cvox.TextChangeEvent('', 0, 0));
   assertEqualStringArrays(['Hello, , deleted'], tts.get());
 
   // Paste / insert a whole word
   obj.changed(new cvox.TextChangeEvent('Hello', 5, 5));
   assertEqualStringArrays(['Hello'], tts.get());
   obj.changed(new cvox.TextChangeEvent('Hello, World', 12, 12));
   assertEqualStringArrays([', World'], tts.get());
@@ skipping 444 matching lines @@
   var firstLine = 'Some   text.\n';
   for (var i = 0; i < firstLine.length; ++i) {
     editable.update(true);
     TestBraille.assertContent(firstLine, i, i);
     window.getSelection().modify('move', 'forward', 'character');
   }
   // We should have crossed the line break to the second line which is blank.
   editable.update(true);
   TestBraille.assertContent('', 0, 0);
 });