Change Range.getBoundingClientRect() when the first rect is empty

chrome/browser/resources/chromeos/chromevox/common/content_editable_extractor_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']);
 
 /**
  * Test fixture.
  * @constructor
@@ skipping 179 matching lines @@
     <div>
       <div id="textbox"
            style="width: 1em; word-wrap: normal"
            contentEditable="true">One two three</div>
     </div>
   */});
   var textbox = $('textbox');
 
   var extractor = new cvox.ContentEditableExtractor();
   extractor.update(textbox);
-  assertEquals('One two three', extractor.getText());
+  assertEquals('One\ntwo\nthree', extractor.getText());
   assertEquals(0, extractor.getLineStart(0));
-  assertEquals(3, extractor.getLineEnd(0));
-  assertEquals(3, extractor.getLineStart(1));
-  assertEquals(7, extractor.getLineEnd(1));
-  assertEquals(7, extractor.getLineStart(2));
+  assertEquals(4, extractor.getLineEnd(0));
+  assertEquals(4, extractor.getLineStart(1));
+  assertEquals(8, extractor.getLineEnd(1));
+  assertEquals(8, extractor.getLineStart(2));
   assertEquals(13, extractor.getLineEnd(2));
 
   // Test all possible cursor positions.
   for (var i = 0; i <= 13; i++) {
     setSelection(textbox.firstChild, i, textbox.firstChild, i);
     extractor.update(textbox);
     assertEquals(i, extractor.getStartIndex());
     assertEquals(i, extractor.getEndIndex());
   }
 });
@@ skipping 101 matching lines @@
   extractor.update(textbox);
   assertEquals(7, extractor.getStartIndex());
   assertEquals(7, extractor.getEndIndex());
 
   // Beginning of third line.
   setSelection(threeTextNode, 0, threeTextNode, 0);
   extractor.update(textbox);
   assertEquals(8, extractor.getStartIndex());
   assertEquals(8, extractor.getEndIndex());
 });