Eliminated named constants for instances of remoting.Error.

remoting/webapp/crd/js/l10n.js

Index: remoting/webapp/crd/js/l10n.js
diff --git a/remoting/webapp/crd/js/l10n.js b/remoting/webapp/crd/js/l10n.js
index 1774fb92acb30212ed1a7a4bcae1c9538b797a57..4f48b914ce4732deca25ed2011055a090cd25a82 100644
--- a/remoting/webapp/crd/js/l10n.js
+++ b/remoting/webapp/crd/js/l10n.js
@@ -28,15 +28,22 @@ l10n.getTranslationOrError = function(tag, opt_substitutions) {
  * and an optional set of substitutions.
  *
  * @param {Element} element The element to localize.
- * @param {string} tag The localization tag.
+ * @param {string|remoting.Error} tagOrError The localization tag or
+ *     an Error object containing the tag.
  * @param {(string|Array)=} opt_substitutions An optional set of substitution
  *     strings corresponding to the "placeholders" attributes in messages.json.
  * @param {boolean=} opt_asHtml If true, set innerHTML instead of innerText.
  *     This parameter should be used with caution.
  * @return {boolean} True if the localization was successful; false otherwise.
  */
-l10n.localizeElementFromTag = function(element, tag, opt_substitutions,
+l10n.localizeElementFromTag = function(element, tagOrError, opt_substitutions,
                                        opt_asHtml) {
+  if (tagOrError == null) {
+    return false;
+  }
+  var tag = typeof tagOrError == 'string' ?
+      /** @type {string} */ (tagOrError) :
+      tagOrError.getTag();
   var translation = l10n.getTranslationOrError(tag, opt_substitutions);
   if (opt_asHtml) {
     element.innerHTML = translation;