Convert wallpaper picker to v2 app

chrome/browser/resources/chromeos/wallpaper_manager/js/wallpaper_manager.js

Index: chrome/browser/resources/chromeos/wallpaper_manager/js/wallpaper_manager.js
diff --git a/chrome/browser/resources/chromeos/wallpaper_manager/js/wallpaper_manager.js b/chrome/browser/resources/chromeos/wallpaper_manager/js/wallpaper_manager.js
index 7c2040cddfc743df4adf768e2dea57cc142bf04e..f0754bbdda230df65bb3ec6ccee3abac363927e0 100644
--- a/chrome/browser/resources/chromeos/wallpaper_manager/js/wallpaper_manager.js
+++ b/chrome/browser/resources/chromeos/wallpaper_manager/js/wallpaper_manager.js
@@ -21,7 +21,6 @@ function WallpaperManager(dialogDom) {
   this.customWallpaperData_ = null;
   this.currentWallpaper_ = null;
   this.fetchManifest_();
-  this.initDom_();
 }
 
 // Anonymous 'namespace'.
@@ -83,23 +82,31 @@ function WallpaperManager(dialogDom) {
   WallpaperManager.prototype.fetchManifest_ = function() {
     var xhr = new XMLHttpRequest();
     var locale = navigator.language;
-    xhr.open('GET', ManifestBaseURL + locale + '.json', false);
+    xhr.open('GET', ManifestBaseURL + locale + '.json', true);
     xhr.send(null);
-    // TODO(bshe): We should save the downloaded manifest to local disk. Other
-    // components may want to use it (i.e. screen saver).
-    if (xhr.status === 200) {
-      this.parseManifest_(xhr.responseText);
-    } else {
-      // Fall back to en locale if current locale is not supported.
-      xhr.open('GET', ManifestBaseURL + 'en.json', false);
-      xhr.send(null);
+    var self = this;
+
+    xhr.addEventListener('load', function(e) {
+      // TODO(bshe): We should save the downloaded manifest to local disk. Other
+      // components may want to use it (i.e. screen saver).
       if (xhr.status === 200) {
-        this.parseManifest_(xhr.responseText);
+        self.parseManifest_(xhr.responseText);
+        self.initDom_();
       } else {
-        this.manifest_ = {};
-        this.butterBar_.showError_(str('connectionFailed'));
+        // Fall back to en locale if current locale is not supported.
+        xhr.open('GET', ManifestBaseURL + 'en.json', true);
+        xhr.send(null);
+        xhr.addEventListener('load', function(e) {
+          if (xhr.status === 200) {
+            self.parseManifest_(xhr.responseText);
+          } else {
+            self.manifest_ = {};
+            self.butterBar_.showError_(str('connectionFailed'));
+          }
+          self.initDom_();
+        });
       }
-    }
+    });
 
     // TODO(bshe): Fall back to saved manifest if there is a problem fetching
     // manifest from server.