Revert of Unit test for sync online wallpaper

chrome/test/data/chromeos/wallpaper_manager/unit_tests/event_page_unittest.js

-// Copyright 2014 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.
-'use strict';
-
-var mockController;
-
-function setUp() {
-  mockController = new MockController();
-  installMockXMLHttpRequest();
-}
-
-function tearDown() {
-  mockController.verifyMocks();
-  mockController.reset();
-  uninstallMockXMLHttpRequest();
-}
-
-// Test sync online wallpaper. When the synced wallpaper info is not the same as
-// the local wallpaper info, wallpaper should set to the synced one.
-function testSyncOnlineWallpaper() {
-  // Setup sync value.
-  var changes = {};
-  changes[Constants.AccessSyncWallpaperInfoKey] = {};
-  changes[Constants.AccessSyncWallpaperInfoKey].newValue = {
-    'url': TestConstants.wallpaperURL,
-    'layout': 'custom',
-    'source': Constants.WallpaperSourceEnum.Online
-  };
-
-  chrome.wallpaperPrivate = {};
-  var mockSetWallpaperIfExists = mockController.createFunctionMock(
-      chrome.wallpaperPrivate, 'setWallpaperIfExists');
-  mockSetWallpaperIfExists.addExpectation(
-      changes[Constants.AccessSyncWallpaperInfoKey].newValue.url,
-      changes[Constants.AccessSyncWallpaperInfoKey].newValue.layout);
-  mockSetWallpaperIfExists.callbackData = [false];
-
-  var mockSetWallpaper = mockController.createFunctionMock(
-      chrome.wallpaperPrivate, 'setWallpaper');
-  mockSetWallpaper.addExpectation(
-      TestConstants.image,
-      changes[Constants.AccessSyncWallpaperInfoKey].newValue.layout,
-      changes[Constants.AccessSyncWallpaperInfoKey].newValue.url);
-
-  chrome.storage.onChanged.dispatch(changes);
-}