Enable user change background image in settings page in Aura build.

chrome/browser/resources/options2/browser_options.js

Index: chrome/browser/resources/options2/browser_options.js
diff --git a/chrome/browser/resources/options2/browser_options.js b/chrome/browser/resources/options2/browser_options.js
index ab34db5496e378d44e1e84b13310a47ff9bae49b..a5965d6f37c7394058921444f04bf6614e448a4b 100644
--- a/chrome/browser/resources/options2/browser_options.js
+++ b/chrome/browser/resources/options2/browser_options.js
@@ -111,6 +111,12 @@ cr.define('options', function() {
             self.onHomePagePrefChanged_.bind(self));
       });
 
+      if (cr.isChromeOS) {

[flackr, 2012/03/05 16:16:03]

Does cr.isChromeOS == if_def('use_aura')? Seems like it would be safer to check
for the existence of the button.

[bshe, 2012/03/06 01:33:27]

Done.

+        $('set-wallpaper').onclick = function(event) {
+          OptionsPage.navigateToPage('setWallpaper');
+        };
+      }
+
       $('themes-gallery').onclick = function(event) {
         window.open(localStrings.getString('themesGalleryURL'));
       };