options image grid: Make sure the images are requested with the appropriate scale.

chrome/browser/resources/chromeos/user_images_grid.js

Index: chrome/browser/resources/chromeos/user_images_grid.js
diff --git a/chrome/browser/resources/chromeos/user_images_grid.js b/chrome/browser/resources/chromeos/user_images_grid.js
index cde2fc7a527b5af6f5e04dfa107551ee3aa74a72..5884c90571d0225406e22f2f3ecb96d915b8654b 100644
--- a/chrome/browser/resources/chromeos/user_images_grid.js
+++ b/chrome/browser/resources/chromeos/user_images_grid.js
@@ -64,7 +64,7 @@ cr.define('options', function() {
     decorate: function() {
       GridItem.prototype.decorate.call(this);
       var imageEl = cr.doc.createElement('img');
-      imageEl.src = this.dataItem.url;
+      imageEl.src = this.dataItem.url + '@' + window.devicePixelRatio + 'x';

[Ivan Korotkov, 2012/08/16 08:31:51]

This wouldn't work with all URLs in this grid (there are data: URLs that don't
support @<factor> scheme.

       imageEl.title = this.dataItem.title || '';
       if (typeof this.dataItem.clickHandler == 'function')
         imageEl.addEventListener('mousedown', this.dataItem.clickHandler);