Disable flaky DevToolsBeforeUnloadTest.TestDevToolsOnDevTools on Win.

chrome/browser/devtools/devtools_sanity_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/cancelable_callback.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/path_service.h"
@@ skipping 651 matching lines @@
   devtools_window->SetDockSideForTest(DEVTOOLS_DOCK_SIDE_UNDOCKED);
   content::WindowedNotificationObserver devtools_close_observer(
       content::NOTIFICATION_WEB_CONTENTS_DESTROYED,
       content::Source<content::WebContents>(
           devtools_window->web_contents()));
 
   OpenDevToolsPopupWindow(devtools_window);
   CloseDevToolsPopupWindow(devtools_window);
 }
 
+// FLaky on Windows bots: see crbug.com/323847
+#if defined(OS_WIN)
+#define MAYBE_TestDevToolsOnDevTools DISABLED_TestDevToolsOnDevTools
+#else
+#define MAYBE_TestDevToolsOnDevTools TestDevToolsOnDevTools
+#endif
 // Tests that BeforeUnload event gets called on devtools that are opened
 // on another devtools.
 IN_PROC_BROWSER_TEST_F(DevToolsBeforeUnloadTest,
-                       TestDevToolsOnDevTools) {
+                       MAYBE_TestDevToolsOnDevTools) {
   ASSERT_TRUE(test_server()->Start());
   LoadTestPage(kDebuggerTestPage);
 
   std::vector<DevToolsWindow*> windows;
   std::vector<content::WindowedNotificationObserver*> close_observers;
   content::WebContents* inspected_web_contents = GetInspectedTab();
   for (int i = 0; i < 3; ++i) {
     DevToolsWindow* devtools_window = OpenDevToolWindowOnWebContents(
       inspected_web_contents);
     windows.push_back(devtools_window);
@@ skipping 302 matching lines @@
 #if defined(OS_WIN) && defined(USE_ASH)
   // Disable this test in Metro+Ash for now (http://crbug.com/262796).
   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kAshBrowserTests))
     return;
 #endif
 
   ASSERT_TRUE(RunExtensionTest("target_list")) << message_;
 }
 
 }  // namespace