Disable LanguageOptionsDictionaryDownloadWebUITest.testdictionaryDownloadRetry on Windows.

chrome/browser/ui/webui/options/language_options_dictionary_download_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 testing messages of dictionary download progress in language
  * options WebUI.
  * @extends {testing.Test}
@@ skipping 92 matching lines @@
 
   options.LanguageOptions.onDictionaryDownloadFailure('en-US');
   expectTrue($('spellcheck-language-message').hidden);
   expectTrue($('language-options-dictionary-downloading-message').hidden);
   expectFalse($('language-options-dictionary-download-failed-message').hidden);
   expectFalse(
       $('language-options-dictionary-download-fail-help-message').hidden);
 });
 
 // Verify that clicking the retry button calls the handler.
+// This test is flaky on Windows. https://crbug.com/616791
+GEN('#if defined(OS_WIN)');
+GEN('#define MAYBE_testdictionaryDownloadRetry ' +
+    'DISABLED_testdictionaryDownloadRetry');
+GEN('#else');
+GEN('#define MAYBE_testdictionaryDownloadRetry testdictionaryDownloadRetry');
+GEN('#endif  // defined(OS_WIN)');
 TEST_F('LanguagesOptionsDictionaryDownloadWebUITest',
-       'testdictionaryDownloadRetry',
+       'MAYBE_testdictionaryDownloadRetry',
        function() {
   this.mockHandler.expects(once()).retryDictionaryDownload('en-US').
       will(callFunction(function() {
         options.LanguageOptions.onDictionaryDownloadBegin('en-US');
       }));
   options.LanguageOptions.onDictionaryDownloadFailure('en-US');
   $('dictionary-download-retry-button').click();
 });