Use OS_WIN instead of OS_WINDOWS to disable flaky ContentSettingsExceptionAreaWebUITest.testOpenCon…

chrome/browser/ui/webui/options/content_settings_exception_area_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_INCLUDE(['options_browsertest_base.js']);
 
 /**
  * TestFixture for content settings exception area WebUI testing.
  * @extends {testing.Test}
  * @constructor
  */
 function ContentSettingsExceptionAreaWebUITest() {}
 
 ContentSettingsExceptionAreaWebUITest.prototype = {
   __proto__: testing.Test.prototype,
 
   /** @override */
   browsePreload: 'chrome://settings-frame/contentExceptions',
 };
 
 // See crbug.com/579666 for OS_LINUX and crbug.com/588586 for Windows.
-GEN('#if defined(OS_CHROMEOS) || defined(OS_LINUX) || defined(OS_WINDOWS)');
+GEN('#if defined(OS_CHROMEOS) || defined(OS_LINUX) || defined(OS_WIN)');
 GEN('#define MAYBE_testOpenContentSettingsExceptionArea ' +
         'DISABLED_testOpenContentSettingsExceptionArea');
 GEN('#else');
 GEN('#define MAYBE_testOpenContentSettingsExceptionArea ' +
         'testOpenContentSettingsExceptionArea');
 GEN('#endif  // defined(OS_CHROMEOS) || defined(OS_LINUX)');
 // Test opening the content settings exception area has correct location.
 TEST_F('ContentSettingsExceptionAreaWebUITest',
        'MAYBE_testOpenContentSettingsExceptionArea', function() {
   assertEquals(this.browsePreload, document.location.href);
@@ skipping 65 matching lines @@
   // NOTE: if this test doesn't succeed, |ContentSettings.setExceptions| may not
   // be restored to its original method. I know no easy way to fix this.
   ContentSettings.setExceptions = function() {
     setExceptions.apply(ContentSettings, arguments);
     setExceptionsCallback();
   };
 
   // Add an item to the location exception area to start the test.
   list.items[0].finishEdit(origin, 'block');
 });