Disabled SystemTrayTest.NullDefaultViewIsNotRecorded on Windows due to flakiness.

ash/common/system/tray/system_tray_unittest.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 "ash/common/system/tray/system_tray.h"
 
 #include <string>
 #include <vector>
 
 #include "ash/common/accelerators/accelerator_controller.h"
@@ skipping 103 matching lines @@
 
   tray->ShowDefaultView(BUBBLE_CREATE_NEW);
   RunAllPendingInMessageLoop();
   histogram_tester.ExpectBucketCount(kVisibleRowsHistogramName,
                                      SystemTrayItem::UMA_NOT_RECORDED, 0);
 
   ASSERT_TRUE(tray->CloseSystemBubble());
   RunAllPendingInMessageLoop();
 }
 
+// TODO(bruthig): Re-enable.  See https://crbug.com/665960.
+#if defined(OS_WIN)
+#define MAYBE_NullDefaultViewIsNotRecorded DISABLED_NullDefaultViewIsNotRecorded
+#else
+#define MAYBE_NullDefaultViewIsNotRecorded NullDefaultViewIsNotRecorded
+#endif
 // Verifies null default views are not recorded in the
 // "Ash.SystemMenu.DefaultView.VisibleItems" histogram.
-TEST_F(SystemTrayTest, NullDefaultViewIsNotRecorded) {
+TEST_F(SystemTrayTest, MAYBE_NullDefaultViewIsNotRecorded) {
   SystemTray* tray = GetPrimarySystemTray();
   ASSERT_TRUE(tray->GetWidget());
 
   TestSystemTrayItem* test_item = new TestSystemTrayItem();
   test_item->set_has_views(false);
   tray->AddTrayItem(test_item);
 
   base::HistogramTester histogram_tester;
 
   tray->ShowDefaultView(BUBBLE_CREATE_NEW);
@@ skipping 518 matching lines @@
   // Hide the default view, ensure the tray bubble height is back to zero.
   ASSERT_TRUE(tray->CloseSystemBubble());
   RunAllPendingInMessageLoop();
 
   EXPECT_EQ(0, notification_tray->tray_bubble_height_for_test());
 }
 #endif  // OS_CHROMEOS
 
 }  // namespace test
 }  // namespace ash