Disable DownloadTest.PerWindowShelf because of flakiness....

chrome/browser/download/download_uitest.cc

 // Copyright (c) 2006-2008 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 <sstream>
 #include <string>
 
 #include "build/build_config.h"
 #if defined(OS_WIN)
 #include <shlwapi.h>
@@ skipping 230 matching lines @@
 
   // Ensure the download shelf is visible on the window.
   scoped_refptr<BrowserProxy> browser(automation()->GetBrowserWindow(0));
   ASSERT_TRUE(browser.get());
   EXPECT_TRUE(WaitForDownloadShelfVisible(browser.get()));
 }
 
 // Test that the download shelf is per-window by starting a download in one
 // tab, opening a second tab, closing the shelf, going back to the first tab,
 // and checking that the shelf is closed.
-TEST_F(DownloadTest, PerWindowShelf) {
+// See bug http://crbug.com/26325
+TEST_F(DownloadTest, FLAKY_PerWindowShelf) {
   FilePath file(FILE_PATH_LITERAL("download-test3.gif"));
   FilePath download_file(FILE_PATH_LITERAL("download-test3-attachment.gif"));
 
   EXPECT_EQ(1, GetTabCount());
 
   NavigateToURL(URLRequestMockHTTPJob::GetMockUrl(file));
   WaitUntilTabCount(1);
 
   // Wait until the file is downloaded.
   PlatformThread::Sleep(action_timeout_ms());
@@ skipping 86 matching lines @@
   ASSERT_EQ(1, window_count);
 
   // Verify that the regular window does not have a download shelf.
   browser->IsShelfVisible(&is_shelf_visible);
   EXPECT_FALSE(is_shelf_visible);
 
   CleanUpDownload(file);
 }
 
 }  // namespace