ash: Remove broken display notification suppression when settings is open

ash/test/ash_test_helper.cc

 // Copyright 2013 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/test/ash_test_helper.h"
 
 #include "ash/accelerators/accelerator_controller_delegate_aura.h"
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/test/material_design_controller_test_api.h"
 #include "ash/common/test/test_session_state_delegate.h"
@@ skipping 16 matching lines @@
 #include "ui/base/material_design/material_design_controller.h"
 #include "ui/base/test/material_design_controller_test_api.h"
 #include "ui/compositor/scoped_animation_duration_scale_mode.h"
 #include "ui/compositor/test/context_factories_for_test.h"
 #include "ui/display/manager/managed_display_info.h"
 #include "ui/message_center/message_center.h"
 #include "ui/wm/core/capture_controller.h"
 #include "ui/wm/core/cursor_manager.h"
 
 #if defined(OS_CHROMEOS)
+#include "ash/system/chromeos/screen_layout_observer.h"
 #include "chromeos/audio/cras_audio_handler.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "device/bluetooth/bluetooth_adapter_factory.h"
 #include "device/bluetooth/dbus/bluez_dbus_manager.h"
 #endif
 
 #if defined(OS_WIN)
 #include "base/win/windows_version.h"
 #endif
 
@@ skipping 83 matching lines @@
   Shell::CreateInstance(init_params);
   aura::test::EnvTestHelper(aura::Env::GetInstance())
       .SetInputStateLookup(std::unique_ptr<aura::InputStateLookup>());
 
   Shell* shell = Shell::GetInstance();
   if (start_session) {
     GetTestSessionStateDelegate()->SetActiveUserSessionStarted(true);
     GetTestSessionStateDelegate()->SetHasActiveUser(true);
   }
 
+#if defined(OS_CHROMEOS)
+  // Tests that change the display configuration generally don't care about the
+  // notifications and the popup UI can interfere with things like cursors.
+  shell->screen_layout_observer()->set_show_notifications_for_testing(false);
+#endif
+
   test::DisplayManagerTestApi(Shell::GetInstance()->display_manager())
       .DisableChangeDisplayUponHostResize();
   ShellTestApi(shell).DisableDisplayAnimator();
 
   test_screenshot_delegate_ = new TestScreenshotDelegate();
   shell->accelerator_controller_delegate()->SetScreenshotDelegate(
       std::unique_ptr<ScreenshotDelegate>(test_screenshot_delegate_));
 }
 
 void AshTestHelper::TearDown() {
@@ skipping 59 matching lines @@
 bool AshTestHelper::SupportsMultipleDisplays() {
 #if defined(OS_WIN)
   return false;
 #else
   return true;
 #endif
 }
 
 }  // namespace test
 }  // namespace ash