MD User Manager: Refactors existing dialogs in User Manager into <user-manager-dialog>

chrome/browser/resources/md_user_manager/import_supervised_user.js

Index: chrome/browser/resources/md_user_manager/import_supervised_user.js
diff --git a/chrome/browser/resources/md_user_manager/import_supervised_user.js b/chrome/browser/resources/md_user_manager/import_supervised_user.js
index a820afa77e2ff2b96581cf3c49c45ea5dd958a45..b7c4784acf54d60f8282856914c2e68ade0191eb 100644
--- a/chrome/browser/resources/md_user_manager/import_supervised_user.js
+++ b/chrome/browser/resources/md_user_manager/import_supervised_user.js
@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 /**
- * @fileoverview 'import-supervised-user' is a popup that allows user to select
+ * @fileoverview 'import-supervised-user' is a dialog that allows user to select
  * a supervised profile from a list of profiles to import on the current device.
  */
 (function() {
@@ -22,16 +22,6 @@ Polymer({
 
   properties: {
     /**
-     * True if the element is currently hidden. The element toggles this in
-     * order to display itself or hide itself once done.
-     * @private {boolean}
-     */
-    popupHidden_: {
-      type: Boolean,
-      value: true
-    },
-
-    /**
      * The currently signed in user and the custodian.
      * @private {?SignedInUser}
      */
@@ -60,7 +50,7 @@ Polymer({
   },
 
   /**
-   * Displays the popup.
+   * Displays the dialog.
    * @param {(!SignedInUser|undefined)} signedInUser
    * @param {!Array<!SupervisedUser>} supervisedUsers
    */
@@ -76,14 +66,7 @@ Polymer({
 
     this.signedInUser_ = signedInUser || null;
     if (this.signedInUser_)
-      this.popupHidden_ = false;
-
-    if (this.popupHidden_)
-      return;
-
-    this.async(function() {
-      this.$$('paper-listbox').focus();
-    }.bind(this));
+      this.$.dialog.open();
   },
 
   /**
@@ -99,11 +82,11 @@ Polymer({
   },
 
   /**
-   * Hides the popup.
+   * Hides the dialog.
    * @private
    */
   onCancelTap_: function() {
-    this.popupHidden_ = true;
+    this.$.dialog.close();
   },
 
   /**
@@ -123,7 +106,7 @@ Polymer({
   onImportTap_: function() {
     var supervisedUser = this.supervisedUsers_[this.supervisedUserIndex_];
     if (this.signedInUser_ && supervisedUser) {
-      this.popupHidden_ = true;
+      this.$.dialog.close();
       // Event is caught by create-profile.
       this.fire('import', {supervisedUser: supervisedUser,
                            signedInUser: this.signedInUser_});