[Md Feedback] Add initial data population for dialog.

chrome/browser/resources/md_feedback/feedback_container.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.
 
 // This Polymer element is used as a container for all the feedback
 // elements. Based on a number of factors, it determines which elements
 // to show and what will be submitted to the feedback servers.
 Polymer({
   is: 'feedback-container',
 
-  /**
-   * Retrieves the feedback privacy note text, if it exists. On non-officially
-   * branded builds, the string is not defined.
-   *
-   * @return {string} Privacy note text.
-   */
-  getPrivacyNote_: function() {
-    return loadTimeData.valueExists('privacyNote') ?
-        this.i18n('privacyNote') : '';
+  properties: {
+    /**
+     * The user's email, if available.
+     * @type {string|undefined}
+     */
+    email: {
+      type: String,
+    },
+
+    /**
+     * The URL of the page the user was on before sending feedback.
+     * @type {string|undefined}
+     */
+    url: {
+      type: String,
+    },
+  },
+
+  ready: function() {
+    // Retrieves the feedback privacy note text, if it exists. On non-official
+    // branded builds, the string is not defined.
+    this.$.privacyNote.innerHTML =
+        loadTimeData.valueExists('privacyNote') ?
+            loadTimeData.getString('privacyNote') : '';
   },
 });