MD Settings: Certificate manager, hooking up all dialogs.

chrome/browser/resources/settings/certificate_manager_page/ca_trust_edit_dialog.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview
  * 'settings-ca-trust-edit-dialog' is the a dialog allowing the user to edit the
  * trust lever of a given certificate authority.
  *
  * @group Chrome Settings Elements
@@ skipping 37 matching lines @@
   /** @private */
   onCancelTap_: function() {
     this.$.dialog.close();
   },
 
   /** @private */
   onOkTap_: function() {
     this.$.spinner.active = true;
     this.browserProxy_.editCaCertificateTrust(
         this.model.id, this.$.ssl.checked,
-        this.$.email.checked, this.$.objSign.checked).then(function() {
-      this.$.spinner.active = false;
-      this.$.dialog.close();
-    }.bind(this),
-    /** @param {!CertificatesError} error */
-    function(error) {
-      // TODO(dpapad): Display error here.
-    });
+        this.$.email.checked, this.$.objSign.checked).then(
+            function() {
+              this.$.spinner.active = false;
+              this.$.dialog.close();
+            }.bind(this),
+            /** @param {!CertificatesError} error */
+            function(error) {
+              this.$.dialog.close();
+              this.fire('certificates-error', error);
+            }.bind(this));
   },
 });