Disable tests failing on Win Tester bot.

chrome/browser/ui/webui/sync_setup_browsertest.js

 // Copyright (c) 2012 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.
 
 GEN('#if !defined(OS_CHROMEOS)');
 
 /**
  * Test fixture for sync setup WebUI testing.
  * @constructor
  * @extends {testing.Test}
@@ skipping 90 matching lines @@
   }));
 
   // The test completes after the sync config is sent out.
   this.mockHandler.expects(once()).SyncSetupConfigure(ANYTHING).
       will(callFunction(testDone));
 
   // Click the "Sign in to Chrome..." button.
   this.startSyncing();
 });
 
-// This test is flaky on Linux bot. See crbug.com/579666
-GEN('#if defined(OS_LINUX)');
+// This test is flaky on Linux and Windows bots. See crbug.com/579666 and
+// crbug.com/638884
+GEN('#if defined(OS_LINUX) || defined(OS_WIN)');
 GEN('#define MAYBE_RestoreSyncDataTypes DISABLED_RestoreSyncDataTypes');
 GEN('#else');
 GEN('#define MAYBE_RestoreSyncDataTypes RestoreSyncDataTypes');
-GEN('#endif  // defined(OS_LINUX)');
+GEN('#endif  // defined(OS_LINUX) || defined(OS_WIN)');
 // Test that switching to and from "Sync everything" saves and restores types.
 TEST_F('SyncSetupWebUITestAsync', 'MAYBE_RestoreSyncDataTypes', function() {
   this.mockHandler.expects(once()).SyncSetupStartSignIn(
     [false] /* createSupervisedUser */).will(callFunction(function() {
     SyncSetupOverlay.showSyncSetupPage('configure', {});
 
     $('sync-select-datatypes').selectedIndex = 1;
     cr.dispatchSimpleEvent($('sync-select-datatypes'), 'change', true);
 
     $('bookmarks-checkbox').checked = false;
     cr.dispatchSimpleEvent($('bookmarks-checkbox'), 'change', true);
 
     $('sync-select-datatypes').selectedIndex = 0;
     cr.dispatchSimpleEvent($('sync-select-datatypes'), 'change', true);
     assertTrue($('bookmarks-checkbox').checked);
 
     $('sync-select-datatypes').selectedIndex = 1;
     cr.dispatchSimpleEvent($('sync-select-datatypes'), 'change', true);
     assertFalse($('bookmarks-checkbox').checked);
 
     testDone();
   }));
 
   this.startSyncing();
 });
 
 GEN('#endif  // OS_CHROMEOS');