Fix some closure compilation issues 8n order to update compiler.jar

chrome/browser/resources/options/pref_ui.js

Index: chrome/browser/resources/options/pref_ui.js
diff --git a/chrome/browser/resources/options/pref_ui.js b/chrome/browser/resources/options/pref_ui.js
index 73247de0e0da2731898defcb799840b4c7cd7ab8..a4a1127c75defebe4b85a0c60d37b4d15cf065aa 100644
--- a/chrome/browser/resources/options/pref_ui.js
+++ b/chrome/browser/resources/options/pref_ui.js
@@ -98,6 +98,13 @@ cr.define('options', function() {
     },
 
     /**
+     * An abstract method for all subclasses to override to update their
+     * preference from existing state.
+     * @protected
+     */
+    updatePrefFromState: assertNotReached,
+
+    /**
      * See |updateDisabledState| above.
      */
     setDisabled: function(reason, disabled) {