MD Settings: Fix initialization timing of browser proxy in change-picture.

chrome/browser/resources/settings/people_page/change_picture.js

 // Copyright 2015 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.
 
 /**
  * Contains the possible types of Change Picture selections.
  * @enum {string}
  */
 var ChangePictureSelectionTypes = {
   CAMERA: 'camera',
@@ skipping 96 matching lines @@
   fallbackImage_: null,
 
   /**
    * Type of the last selected icon. This is used to jump back to the camera
    * after the user discards a newly taken photo.
    * @private {string}
    */
   lastSelectedImageType_: '',
 
   /** @override */
+  ready: function() {
+    this.browserProxy_ = settings.ChangePictureBrowserProxyImpl.getInstance();
+  },
+
+  /** @override */
   attached: function() {
-    this.browserProxy_ = settings.ChangePictureBrowserProxyImpl.getInstance();
     this.addWebUIListener('default-images-changed',
                           this.receiveDefaultImages_.bind(this));
     this.addWebUIListener('selected-image-changed',
                           this.receiveSelectedImage_.bind(this));
     this.addWebUIListener('old-image-changed',
                           this.receiveOldImage_.bind(this));
     this.addWebUIListener('profile-image-changed',
                           this.receiveProfileImage_.bind(this));
     this.addWebUIListener('camera-presence-changed',
                           this.receiveCameraPresence_.bind(this));
@@ skipping 312 matching lines @@
    */
   getAuthorWebsite_: function(selectedItem, defaultImages) {
     if (!this.isAuthorCreditShown_(selectedItem))
       return '';
 
     assert(selectedItem.dataset.defaultImageIndex !== null &&
            selectedItem.dataset.defaultImageIndex < defaultImages.length);
     return defaultImages[selectedItem.dataset.defaultImageIndex].website;
   },
 });