Adds DesktopWindowTreeHostMus

ui/aura/test/aura_test_base.h

 // 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.
 
 #ifndef UI_AURA_TEST_AURA_TEST_BASE_H_
 #define UI_AURA_TEST_AURA_TEST_BASE_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 39 matching lines @@
   void set_window_manager_delegate(
       WindowManagerDelegate* window_manager_delegate) {
     window_manager_delegate_ = window_manager_delegate;
   }
 
   void set_window_tree_client_delegate(
       WindowTreeClientDelegate* window_tree_client_delegate) {
     window_tree_client_delegate_ = window_tree_client_delegate;
   }
 
-  // Turns on mus. Must be called before SetUp().
-  void EnableMus();
+  // Turns on mus with a test WindowTree. Must be called before SetUp().
+  void EnableMusWithTestWindowTree();
 
   // Used to configure the backend. This is exposed to make parameterized tests
   // easy to write. This *must* be called from SetUp().
   void ConfigureBackend(BackendType type);
 
   void RunAllPendingInMessageLoop();
 
   void ParentWindow(Window* window);
 
   // A convenience function for dispatching an event to |dispatcher()|.
@@ skipping 76 matching lines @@
  private:
   bool setup_called_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(AuraTestBaseWithType);
 };
 
 }  // namespace test
 }  // namespace aura
 
 #endif  // UI_AURA_TEST_AURA_TEST_BASE_H_