Enabled Selection (ctrl-A) on login password

chrome/browser/resources/shared/js/util.js

 // Copyright (c) 2012 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.
 
 /**
  * The global object.
  * @type {!Object}
  * @const
  */
 var global = this;
@@ skipping 89 matching lines @@
   if (afterA == b) {
     swapDomNodes(b, a);
     return;
   }
   var aParent = a.parentNode;
   b.parentNode.replaceChild(a, b);
   aParent.insertBefore(b, afterA);
 }
 
 /**
- * Disables text selection and dragging.
+ * Disables text selection and dragging, with optional whitelist callbacks.
+ * @param {function(Event):boolean=} opt_allowSelectStart Unless this function
+ *    is defined and returns true, the onselectionstart event will be
+ *    surpressed.
+ * @param {function(Event):boolean=} opt_allowDragStart Unless this function
+ *    is defined and returns true, the ondragstart event will be surpressed.
  */
-function disableTextSelectAndDrag() {
+function disableTextSelectAndDrag(opt_allowSelectStart, opt_allowDragStart) {
   // Disable text selection.
   document.onselectstart = function(e) {
-    e.preventDefault();
-  }
+    if (!(opt_allowSelectStart && opt_allowSelectStart.call(this, e)))
+      e.preventDefault();
+  };
 
   // Disable dragging.
   document.ondragstart = function(e) {
-    e.preventDefault();
-  }
+    if (!(opt_allowDragStart && opt_allowDragStart.call(this, e)))
+      e.preventDefault();
+  };
 }
 
 /**
  * Check the directionality of the page.
  * @return {boolean} True if Chrome is running an RTL UI.
  */
 function isRTL() {
   return document.documentElement.dir == 'rtl';
 }
 
@@ skipping 65 matching lines @@
  * @param {string} value The value of the param.
  * @return {string} The new URL.
  */
 function appendParam(url, key, value) {
   var param = encodeURIComponent(key) + '=' + encodeURIComponent(value);
 
   if (url.indexOf('?') == -1)
     return url + '?' + param;
   return url + '&' + param;
 }