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

chrome/browser/resources/options/content_settings_exceptions_area.js

Index: chrome/browser/resources/options/content_settings_exceptions_area.js
diff --git a/chrome/browser/resources/options/content_settings_exceptions_area.js b/chrome/browser/resources/options/content_settings_exceptions_area.js
index ed1bad6f7033c2d972b0033d2a25cd30b7c9a40b..3ad7ac62a552f0e1079168e4d2c97cf12e4e61c1 100644
--- a/chrome/browser/resources/options/content_settings_exceptions_area.js
+++ b/chrome/browser/resources/options/content_settings_exceptions_area.js
@@ -478,12 +478,6 @@
     __proto__: InlineEditableItemList.prototype,
 
     /**
-     * True if user may set preference exceptions.
-     * @private {boolean}
-     */
-    allowEdit_: true,
-
-    /**
      * Called when an element is decorated as a list.
      */
     decorate: function() {
@@ -526,40 +520,6 @@
     },
 
     /**
-     * Updates visibility of each row, depending on content.
-     */
-    updateRowVisibility: function() {
-      // Rows with user exceptions are visible iff this.isEditable().
-      // All other rows are visible.
-      var isEditable = this.isEditable();
-      for (var index = 0; index < this.dataModel.length; ++index) {
-        var item = this.getListItemByIndex(index);
-        if (item.dataItem.source == 'preference')
-          item.hidden = !isEditable;
-      }
-    },
-
-    /**
-     * Sets whether user is allowed to set preference exceptions. Updates UI.
-     *
-     * @param {boolean} allowEdit New value for this.allowEdit_.
-     */
-    setAllowEdit: function(allowEdit) {
-      var oldIsEditable = this.isEditable();
-      this.allowEdit_ = allowEdit;
-      var newIsEditable = this.isEditable();
-
-      // If visibility changed, add or remove the Add New Exception row.
-      if (oldIsEditable != newIsEditable) {
-        if (newIsEditable)
-          this.dataModel.push(null);
-        else
-          this.dataModel.pop();
-        this.updateRowVisibility();
-      }
-    },
-
-    /**
      * Sets the exceptions in the js model.
      *
      * @param {Array<options.Exception>} entries A list of dictionaries of
@@ -576,7 +536,6 @@
       var args = [0, deleteCount];
       args.push.apply(args, entries);
       this.dataModel.splice.apply(this.dataModel, args);
-      this.updateRowVisibility();
     },
 
     /**
@@ -603,14 +562,14 @@
      * Returns whether the rows are editable in this list.
      */
     isEditable: function() {
-      return this.allowEdit_ && isEditableType(this.contentType);
+      // Exceptions of the following lists are not editable for now.
+      return isEditableType(this.contentType);
     },
 
     /**
      * Removes all exceptions from the js model.
      */
     reset: function() {
-      this.allowEdit_ = true;
       if (this.isEditable()) {
         // The null creates the Add New Exception row.
         this.dataModel = new ArrayDataModel([null]);