Removes code using mus client lib

ui/views/test/views_test_helper_aura.cc

 // Copyright 2014 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 "ui/views/test/views_test_helper_aura.h"
 
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/test/aura_test_helper.h"
 #include "ui/views/test/platform_test_helper.h"
 #include "ui/wm/core/capture_controller.h"
@@ skipping 61 matching lines @@
         aura::client::GetScreenPositionClient(GetContext()))
       aura::client::SetScreenPositionClient(GetContext(), nullptr);
   }
 
   aura_test_helper_->TearDown();
   CHECK(!wm::CaptureController::Get() ||
         !wm::CaptureController::Get()->is_active());
 }
 
 gfx::NativeWindow ViewsTestHelperAura::GetContext() {
-  if (PlatformTestHelper::IsAuraMusClient()) {
+  if (PlatformTestHelper::IsMus()) {
     // GetContext() returns the root of a WindowTreeHost associated with a
     // single display that is intended for an ash like environment. Such a
     // configuration doesn't make sense for aura-mus-client, where it's testing
     // DesktopNativeWidgetAura.
     return nullptr;
   }
 
   return aura_test_helper_->root_window();
 }
 
 }  // namespace views