Mark DownloadTest.BrowserCloseAfterDownload as failing on all platforms

chrome/browser/download/download_browsertest.cc

 // Copyright (c) 2011 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.
 
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_temp_dir.h"
 #include "base/path_service.h"
 #include "base/test/test_file_util.h"
@@ skipping 1302 matching lines @@
       contents->render_view_host(),
       L"",
       L"window.domAutomationController.send(window.webui_responded_);",
       &webui_responded));
   EXPECT_TRUE(webui_responded);
 }
 
 // Test for crbug.com/12745. This tests that if a download is initiated from
 // a chrome:// page that has registered and onunload handler, the browser
 // will be able to close.
-// Fails on Windows and Linux.  http://crbug.com/82278
-#if defined(OS_WIN) || defined(OS_LINUX)
-#define MAYBE_BrowserCloseAfterDownload FAILS_BrowserCloseAfterDownload
-#else
-#define MAYBE_BrowserCloseAfterDownload BrowserCloseAfterDownload
-#endif
-IN_PROC_BROWSER_TEST_F(DownloadTest, MAYBE_BrowserCloseAfterDownload) {
+// After several correct executions, this test starts failing on the build
+// bots and then continues to fail consistently.  http://crbug.com/82278
+IN_PROC_BROWSER_TEST_F(DownloadTest, FAILS_BrowserCloseAfterDownload) {
   GURL downloads_url(chrome::kAboutFlagsURL);
   FilePath file(FILE_PATH_LITERAL("download-test1.lib"));
   GURL download_url(URLRequestMockHTTPJob::GetMockUrl(file));
 
   ui_test_utils::NavigateToURL(browser(), downloads_url);
   TabContents* contents = browser()->GetSelectedTabContents();
   ASSERT_TRUE(contents);
   bool result = false;
   EXPECT_TRUE(ui_test_utils::ExecuteJavaScriptAndExtractBool(
       contents->render_view_host(),
       L"",
       L"window.onunload = function() { var do_nothing = 0; }; "
       L"window.domAutomationController.send(true);",
       &result));
   EXPECT_TRUE(result);
 
   DownloadAndWait(browser(), download_url, EXPECT_NO_SELECT_DIALOG);
 
   ui_test_utils::WindowedNotificationObserver signal(
       NotificationType::BROWSER_CLOSED,
       Source<Browser>(browser()));
   browser()->CloseWindow();
   signal.Wait();
 }
 
 }  // namespace