Read the selected text explicitly when focusing a texdt field

chrome/browser/resources/chromeos/chromevox/cvox2/background/automation_util.js

Index: chrome/browser/resources/chromeos/chromevox/cvox2/background/automation_util.js
diff --git a/chrome/browser/resources/chromeos/chromevox/cvox2/background/automation_util.js b/chrome/browser/resources/chromeos/chromevox/cvox2/background/automation_util.js
index 416806c3c6d1e607bd784b9bdcf010889ba571a8..4778e0f69b1d55726851c9f93ed9286731225d34 100644
--- a/chrome/browser/resources/chromeos/chromevox/cvox2/background/automation_util.js
+++ b/chrome/browser/resources/chromeos/chromevox/cvox2/background/automation_util.js
@@ -297,4 +297,19 @@ AutomationUtil.getTopLevelRoot = function(node) {
   return root;
 };
 
+/**
+ * @param {!AutomationNode} prevNode
+ * @param {!AutomationNode} node
+ * @return {AutomationNode}
+ */
+AutomationUtil.getLeastCommonAncestor = function(prevNode, node) {
+  if (prevNode == node)
+    return node;
+
+  var prevAncestors = AutomationUtil.getAncestors(prevNode);
+  var ancestors = AutomationUtil.getAncestors(node);
+  var divergence = AutomationUtil.getDivergence(prevAncestors, ancestors);
+  return ancestors[divergence - 1];
+};
+
 });  // goog.scope