Chrome OS wallpaper manager.

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

 // Copyright (c) 2013 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.
 
 var WALLPAPER_PICKER_WIDTH = 574;
 var WALLPAPER_PICKER_HEIGHT = 420;
 
 var wallpaperPickerWindow;
 
 var surpriseWallpaper = null;
@@ skipping 132 matching lines @@
             element.available_for_surprise_me == undefined;
       });
       var index = Math.floor(Math.random() * filtered.length);
       var wallpaper = filtered[index];
       var wallpaperURL = wallpaper.base_url + Constants.HighResolutionSuffix;
       var onSuccess = function() {
         WallpaperUtil.saveToStorage(
             Constants.AccessLastSurpriseWallpaperChangedDate,
             dateString,
             true);
-      }
+      };
       WallpaperUtil.setOnlineWallpaper(wallpaperURL, wallpaper.default_layout,
           onSuccess, self.retryLater_.bind(self));
     }
   });
 };
 
 /**
  * Sets wallpaper to the wallpaper specified by item from rss. If downloading
  * the wallpaper fails, retry one hour later.
  * @param {Element} item The wallpaper rss item element.
@@ skipping 54 matching lines @@
     wallpaperPickerWindow.focus();
     chrome.wallpaperPrivate.minimizeInactiveWindows();
     return;
   }
 
   chrome.app.window.create('main.html', {
     frame: 'none',
     width: WALLPAPER_PICKER_WIDTH,
     height: WALLPAPER_PICKER_HEIGHT,
     resizable: false,
-    transparentBackground: true
+    alphaEnabled: true
   }, function(w) {
     wallpaperPickerWindow = w;
     chrome.wallpaperPrivate.minimizeInactiveWindows();
     w.onClosed.addListener(function() {
       chrome.wallpaperPrivate.restoreMinimizedWindows();
     });
   });
 });
 
 chrome.storage.onChanged.addListener(function(changes, namespace) {
@@ skipping 25 matching lines @@
           WallpaperUtil.setOnlineWallpaper(newValue.url, newValue.layout,
             function() {}, function() {});
         }
         WallpaperUtil.saveToStorage(Constants.AccessLocalWallpaperInfoKey,
                                     newValue, false);
       }
     });
   }
 });