Make ChromeVox use child-index based offsets again for selection.

chrome/browser/resources/chromeos/chromevox/cvox2/background/cursors_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']);
 
 /**
  * Test fixture for cvox2.cursors.
  * @constructor
@@ skipping 329 matching lines @@
 
     var multiSel = new cursors.Range(
         new cursors.Cursor(p1.firstChild, 2),
         new cursors.Cursor(p2.firstChild, 4));
 
     function verifySel() {
       if (root.anchorObject == link.firstChild) {
         assertEquals(link.firstChild, root.anchorObject);
         assertEquals(0, root.anchorOffset);
         assertEquals(link.firstChild, root.focusObject);
-        assertEquals(16, root.focusOffset);
+        assertEquals(1, root.focusOffset);
         this.listenOnce(root, 'textSelectionChanged', verifySel);
         multiSel.select();
       } else {
         assertEquals(p1.firstChild, root.anchorObject);
         assertEquals(2, root.anchorOffset);
         assertEquals(p2.firstChild, root.focusObject);
         assertEquals(4, root.focusOffset);
       }
     }
 
@@ skipping 13 matching lines @@
     assertEquals(secondLineCursor.node.parent,
                  secondLineCursor.selectionNode_);
 
     // This selects the entire node via a character offset.
     assertEquals(6, secondLineCursor.selectionIndex_);
 
     // Index into the characters.
     secondLineCursor = new cursors.Cursor(secondLine, 1);
     assertEquals(7, secondLineCursor.selectionIndex_);
 
-    // Now, try selecting via node offsets. This defaults to index 0 and not
-    // index in parent because Blink accessibility selection doesn't always
-    // work.
+    // Now, try selecting via node offsets.
     var cursor = new cursors.Cursor(root.firstChild, -1);
-    assertEquals(root.firstChild, cursor.selectionNode_);
+    assertEquals(root, cursor.selectionNode_);
     assertEquals(0, cursor.selectionIndex_);
 
     cursor = new cursors.Cursor(root.firstChild.nextSibling, -1);
-    assertEquals(root.firstChild.nextSibling, cursor.selectionNode_);
-    assertEquals(0, cursor.selectionIndex_);
+    assertEquals(root, cursor.selectionNode_);
+    assertEquals(1, cursor.selectionIndex_);
   });
 });
 
 TEST_F('CursorsTest', 'InlineElementOffset', function() {
   this.runWithLoadedTree(function() {/*!
     <p>This<br> is a<a href="#g">test</a>of selection</p>
   */}, function(root) {
     root.addEventListener('textSelectionChanged', this.newCallback(function(evt) {
       // This is a little unexpected though not really incorrect; Ctrl+C works.
       assertEquals(testNode, root.anchorObject);
@@ skipping 47 matching lines @@
 
     // Negative cases.
     assertFalse(rootRange.contentEquals(regionRange));
     assertFalse(rootRange.contentEquals(staticTextRange));
     assertFalse(rootRange.contentEquals(inlineTextBoxRange));
     assertFalse(regionRange.contentEquals(rootRange));
     assertFalse(staticTextRange.contentEquals(rootRange));
     assertFalse(inlineTextBoxRange.contentEquals(rootRange));
   });
 });