[Chrome Settings UI] If User Exceptions are not allowed, prevent editing / viewing.

chrome/browser/resources/options/content_settings.js

Index: chrome/browser/resources/options/content_settings.js
diff --git a/chrome/browser/resources/options/content_settings.js b/chrome/browser/resources/options/content_settings.js
index 33cac98257f4c9a08e87a3fa3c3db94a921c6203..78f79e0bbfc70b0e3cf377c4d1906bdf5d6fd906 100644
--- a/chrome/browser/resources/options/content_settings.js
+++ b/chrome/browser/resources/options/content_settings.js
@@ -131,6 +131,18 @@ cr.define('options', function() {
   };
 
   /**
+   * Updates UI to allow/disallow user from using exceptions for a particular
+   * content setting.
+   * @param {string} type The content settings type being updated.
+   * @param {boolean} allowUserExceptions Whether user may set exceptions.
+   */
+  ContentSettings.setUserExceptionsAllowed = function(type,
+                                                      allowUserExceptions) {
+    // Update exceptions UI window.
+    this.getExceptionsList(type, 'normal').setAllowEdit(allowUserExceptions);
+  };
+
+  /**
    * Initializes an exceptions list.
    * @param {string} type The content type that we are setting exceptions for.
    * @param {Array<options.Exception>} exceptions An array of pairs, where the