[views-mus] Prevent creating a native OzonePlatform in mus tests.

ash/system/status_area_widget_unittest.cc

 // Copyright 2017 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/system/status_area_widget.h"
 
 #include "ash/ash_switches.h"
 #include "ash/system/ime_menu/ime_menu_tray.h"
 #include "ash/system/overview/overview_button_tray.h"
 #include "ash/system/palette/palette_tray.h"
 #include "ash/system/session/logout_button_tray.h"
 #include "ash/system/tray/system_tray.h"
 #include "ash/system/virtual_keyboard/virtual_keyboard_tray.h"
 #include "ash/system/web_notification/web_notification_tray.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/status_area_widget_test_helper.h"
 #include "base/command_line.h"
+#include "ui/aura/env.h"
 
 namespace ash {
 
 using StatusAreaWidgetTest = test::AshTestBase;
 
 // Tests that status area trays are constructed.
 TEST_F(StatusAreaWidgetTest, Basics) {
   StatusAreaWidget* status = StatusAreaWidgetTestHelper::GetStatusAreaWidget();
 
   // Status area is visible by default.
@@ skipping 29 matching lines @@
   EXPECT_FALSE(status->virtual_keyboard_tray_for_testing()->visible());
 }
 
 class StatusAreaWidgetPaletteTest : public test::AshTestBase {
  public:
   StatusAreaWidgetPaletteTest() {}
   ~StatusAreaWidgetPaletteTest() override {}
 
   // testing::Test:
   void SetUp() override {
-    base::CommandLine* cmd = base::CommandLine::ForCurrentProcess();
-    cmd->AppendSwitch(switches::kAshForceEnablePalette);
-    // It's difficult to write a test that marks the primary display as
-    // internal before the status area is constructed. Just force the palette
-    // for all displays.
-    cmd->AppendSwitch(switches::kAshEnablePaletteOnAllDisplays);
+    // TODO(erg): The implementation of PaletteTray assumes it can talk directly
+    // to ui::InputDeviceManager in a mus environment, which it can't.
+    if (aura::Env::GetInstance()->mode() != aura::Env::Mode::MUS) {
+      base::CommandLine* cmd = base::CommandLine::ForCurrentProcess();
+      cmd->AppendSwitch(switches::kAshForceEnablePalette);
+      // It's difficult to write a test that marks the primary display as
+      // internal before the status area is constructed. Just force the palette
+      // for all displays.
+      cmd->AppendSwitch(switches::kAshEnablePaletteOnAllDisplays);
+    }
     AshTestBase::SetUp();
   }
 };
 
 // Tests that the stylus palette tray is constructed.
 TEST_F(StatusAreaWidgetPaletteTest, Basics) {
+  // TODO(erg): The implementation of PaletteTray assumes it can talk directly
+  // to ui::InputDeviceManager in a mus environment, which it can't.
+  if (aura::Env::GetInstance()->mode() == aura::Env::Mode::MUS)
+    return;
+
   StatusAreaWidget* status = StatusAreaWidgetTestHelper::GetStatusAreaWidget();
   EXPECT_TRUE(status->palette_tray());
 
   // Auto-hidden shelf would not be forced to be visible.
   EXPECT_FALSE(status->ShouldShowShelf());
 }
 
 }  // namespace ash