MD Settings: Move browserProxies outside of Polymer "properties".

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' allows the user to
  *  - specify the trust level of a certificate authority that is being
  *    imported.
  *  - edit the trust level of an already existing certificate authority.
  */
 Polymer({
   is: 'settings-ca-trust-edit-dialog',
 
   properties: {
-    /** @private {!settings.CertificatesBrowserProxy} */
-    browserProxy_: Object,
-
     /** @type {!CertificateSubnode|!NewCertificateSubNode} */
     model: Object,
 
     /** @private {?CaTrustInfo} */
     trustInfo_: Object,
 
     /** @private {string} */
     explanationText_: String,
   },
 
+  /** @private {?settings.CertificatesBrowserProxy} */
+  browserProxy_: null,
+
   /** @override */
   ready: function() {
     this.browserProxy_ = settings.CertificatesBrowserProxyImpl.getInstance();
   },
 
   /** @override */
   attached: function() {
     this.explanationText_ = loadTimeData.getStringF(
         'certificateManagerCaTrustEditDialogExplanation',
         this.model.name);
@@ skipping 32 matching lines @@
       this.$.spinner.active = false;
       /** @type {!CrDialogElement} */ (this.$.dialog).close();
     }.bind(this),
     /** @param {!CertificatesError} error */
     function(error) {
       /** @type {!CrDialogElement} */ (this.$.dialog).close();
       this.fire('certificates-error', {error: error, anchor: null});
     }.bind(this));
   },
 });