[MD settings] I18nBehavior return textContent from i18n()

ui/webui/resources/js/i18n_behavior.js

Index: ui/webui/resources/js/i18n_behavior.js
diff --git a/ui/webui/resources/js/i18n_behavior.js b/ui/webui/resources/js/i18n_behavior.js
index 931f8c8f029ecead1ea15335e378ca8a47ccbe1b..94704db51d7a7f1b0787250b7f32d4f270cf5ff0 100644
--- a/ui/webui/resources/js/i18n_behavior.js
+++ b/ui/webui/resources/js/i18n_behavior.js
@@ -39,6 +39,7 @@ var I18nBehavior = {
   /**
    * Returns a translated string where $1 to $9 are replaced by the given
    * values. Also sanitizes the output to filter out dangerous HTML/JS.
+   * Use with Polymer bindings that are *not* inner-h-t-m-l.
    * @param {string} id The ID of the string to translate.
    * @param {...string} var_args Values to replace the placeholders $1 to $9
    *     in the string.
@@ -46,22 +47,20 @@ var I18nBehavior = {
    */
   i18n: function(id, var_args) {
     var rawString = this.i18nRaw_.apply(this, arguments);
-    var htmlStr =
-        parseHtmlSubset('<b>' + rawString + '</b>').firstChild.innerHTML;
-    // TODO(dschuyler): use textContent rather than innerHTML; remove replace().
-    return htmlStr.replace(/&nbsp;/g, '\u00a0');
+    return parseHtmlSubset('<b>' + rawString + '</b>').firstChild.textContent;
   },
 
   /**
    * Similar to 'i18n', returns a translated, sanitized, substituted string.
    * It receives the string ID and a dictionary containing the substitutions
-   * as well as optional additional allowed tags and attributes.
+   * as well as optional additional allowed tags and attributes. Use with
+   * Polymer bindings that are inner-h-t-m-l, for example.
    * @param {string} id The ID of the string to translate.
-   * @param {{substitutions: (Array<string>|undefined),
-   *          attrs: (Object<function(Node, string):boolean>|undefined),
-   *          tags: (Array<string>|undefined)}} opts
+   * @param {I18nAdvancedOpts=} opts
+   * @return {string}
    */
   i18nAdvanced: function(id, opts) {
+    opts = opts || {};
     var args = [id].concat(opts.substitutions || []);
     var rawString = this.i18nRaw_.apply(this, args);
     return parseHtmlSubset('<b>' + rawString + '</b>', opts.tags, opts.attrs)
@@ -91,23 +90,31 @@ var I18nBehavior = {
   },
 
   /**
-   * Call this when UI strings may have changed. This will send an update to any
-   * data bindings to i18nDynamic(locale, ...).
+   * Call this when UI strings may have changed. This will send an update to
+   * any data bindings to i18nDynamic(locale, ...).
    */
   i18nUpdateLocale: function() {
     this.locale = loadTimeData.getString('language');
   },
 };
 
+/**
+ * @typedef {{
+ *   substitutions: (Array<string>|undefined),
+ *   attrs: (Object<function(Node, string):boolean>|undefined),
+ *   tags: (Array<string>|undefined),
+ * }}
+ */
+var I18nAdvancedOpts;
+
 /**
  * TODO(stevenjb): Replace with an interface. b/24294625
  * @typedef {{
- *   i18n: function(string, ...string): string}},
- *   i18nAdvanced: function({
- *     substitutions: (Array<string>|undefined),
- *     attrs: (Object<function(Node, string):boolean>|undefined),
- *     tags: (Array<string>|undefined)}, opts),
- *   i18nExists: function(string)
+ *   i18n: function(string, ...string): string,
+ *   i18nAdvanced: function(string, I18nAdvancedOpts=): string,
+ *   i18nDynamic: function(string, string, ...string): string,
+ *   i18nExists: function(string),
+ *   i18nUpdateLocale: function()
  * }}
  */
 I18nBehavior.Proto;