Convert wallpaper picker to v2 app

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

Index: chrome/browser/resources/chromeos/wallpaper_manager/js/wallpaper_images_grid.js
diff --git a/chrome/browser/resources/chromeos/wallpaper_manager/js/wallpaper_images_grid.js b/chrome/browser/resources/chromeos/wallpaper_manager/js/wallpaper_images_grid.js
index cb42b166e915e4dfae5bc026cf1277da84f886e9..0561b8992600743a5290200bf7ef6f6dd3fdfbdb 100644
--- a/chrome/browser/resources/chromeos/wallpaper_manager/js/wallpaper_images_grid.js
+++ b/chrome/browser/resources/chromeos/wallpaper_manager/js/wallpaper_images_grid.js
@@ -32,11 +32,22 @@ cr.define('wallpapers', function() {
     decorate: function() {
       GridItem.prototype.decorate.call(this);
       var imageEl = cr.doc.createElement('img');
-      // Thumbnail
-      imageEl.src = this.dataItem.baseURL + ThumbnailSuffix;
-      // Remove any garbage added by GridItem and ListItem decorators.
-      this.textContent = '';
-      this.appendChild(imageEl);
+      var xhr = new XMLHttpRequest();
+      xhr.open('GET', this.dataItem.baseURL + ThumbnailSuffix, true);
+      xhr.responseType = 'blob';
+      xhr.send(null);
+      var self = this;
+      xhr.addEventListener('load', function(e) {
+        if (xhr.status === 200) {
+          self.textContent = '';
+          imageEl.src = window.URL.createObjectURL(xhr.response);
+          imageEl.addEventListener('load', function(e) {
+            window.URL.revokeObjectURL(this.src);
+          });
+          self.appendChild(imageEl);
+        }
+        //TODO(bshe): Add error handleing.

[miket_OOO, 2012/11/12 21:39:46]

Nit: "handling"

Do you really think this TODO will ever be resolved if it's checked in like
this? If yes, proceed.

If no, then please either handle the error, or just remove the TODO.

[bshe, 2012/11/12 22:24:28]

I guess I am not sure how should we proceed when there is an error. Should we
just display a stub image or should we just skip the thumbnail or should we
display some kind of error message? I am more lean towards skip the
thumbnail(remove the TODO) for now. Later if we found this is not what we want,
I will fix it then.


On 2012/11/12 21:39:46, miket wrote:

+      });
     },
   };