Disable DownloadDangerPromptTest.TestAll on Windows for flaky timeouts.

chrome/browser/download/download_danger_prompt_browsertest.cc

 // 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.
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "chrome/browser/download/download_danger_prompt.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
@@ skipping 83 matching lines @@
   }
 
   content::MockDownloadItem download_;
   DownloadDangerPrompt* prompt_;
   DownloadDangerPrompt::Action expected_action_;
   bool did_receive_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadDangerPromptTest);
 };
 
-IN_PROC_BROWSER_TEST_F(DownloadDangerPromptTest, TestAll) {
+// Disabled for flaky timeouts on Windows. crbug.com/446696
+#if defined(OS_WIN)
+#define MAYBE_TestAll DISABLED_TestAll
+#else
+#define MAYBE_TestAll TestAll
+#endif
+IN_PROC_BROWSER_TEST_F(DownloadDangerPromptTest, MAYBE_TestAll) {
   // ExperienceSampling: Set default actions for DownloadItem methods we need.
   ON_CALL(download(), GetURL()).WillByDefault(ReturnRef(GURL::EmptyGURL()));
   ON_CALL(download(), GetReferrerUrl())
       .WillByDefault(ReturnRef(GURL::EmptyGURL()));
   ON_CALL(download(), GetBrowserContext())
       .WillByDefault(Return(browser()->profile()));
 
   OpenNewTab();
 
   // Clicking the Accept button should invoke the ACCEPT action.
@@ skipping 29 matching lines @@
   download().NotifyObserversDownloadUpdated();
   SimulatePromptAction(DownloadDangerPrompt::ACCEPT);
   VerifyExpectations();
 
   // If the containing tab is closed, the dialog should DISMISS itself.
   OpenNewTab();
   SetUpExpectations(DownloadDangerPrompt::DISMISS);
   chrome::CloseTab(browser());
   VerifyExpectations();
 }