Revert "Fix the browser crash when changing wallpaper with chrome.wallpaper API."

chrome/test/data/extensions/api_test/wallpaper/test.js

Index: chrome/test/data/extensions/api_test/wallpaper/test.js
diff --git a/chrome/test/data/extensions/api_test/wallpaper/test.js b/chrome/test/data/extensions/api_test/wallpaper/test.js
index 57d5b02b0c4400c58de2f119fffef973c52d58d5..9302d1bb617db3d40b028c8f69af2898f633a0ba 100644
--- a/chrome/test/data/extensions/api_test/wallpaper/test.js
+++ b/chrome/test/data/extensions/api_test/wallpaper/test.js
@@ -74,19 +74,6 @@ chrome.test.getConfig(function(config) {
     }
   };
 
-  var testSetWallpaperThumbnail = function(relativeURL) {
-    var url = baseURL + relativeURL;
-    chrome.wallpaper.setWallpaper(
-      { 'url': url,
-        'layout': 'CENTER_CROPPED',
-        'filename': 'test',
-        'thumbnail': true
-      }, pass(function(thumbnail) {
-        var buffer = new Uint8Array(thumbnail);
-        chrome.test.assertTrue(buffer.length > 0);
-      }));
-  };
-
   chrome.test.runTests([
     function setJpgWallpaperFromAppLocalFile() {
       testSetWallpaperFromArrayBuffer('test.jpg');
@@ -117,9 +104,6 @@ chrome.test.getConfig(function(config) {
                               false,
                               'Set wallpaper was canceled.');
       testSetWallpaperFromURL('test.jpg', true);
-    },
-    function getThumbnailAferSetWallpaper() {
-      testSetWallpaperThumbnail('test.jpg');
     }
   ]);
 });