Converts ash to use aura-mus

ui/aura/env.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_ENV_H_
 #define UI_AURA_ENV_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 37 matching lines @@
   };
 
   ~Env() override;
 
   // NOTE: if you pass in Mode::MUS it is expected that you call
   // SetWindowTreeClient() before any windows are created.
   static std::unique_ptr<Env> CreateInstance(Mode mode = Mode::LOCAL);
   static Env* GetInstance();
   static Env* GetInstanceDontCreate();
 
+  Mode mode() const { return mode_; }
+
   // Called internally to create the appropriate WindowPort implementation.
   std::unique_ptr<WindowPort> CreateWindowPort(Window* window);
 
   void AddObserver(EnvObserver* observer);
   void RemoveObserver(EnvObserver* observer);
 
   int mouse_button_flags() const { return mouse_button_flags_; }
   void set_mouse_button_flags(int mouse_button_flags) {
     mouse_button_flags_ = mouse_button_flags;
   }
@@ skipping 12 matching lines @@
   bool is_touch_down() const { return is_touch_down_; }
   void set_touch_down(bool value) { is_touch_down_ = value; }
 
   void set_context_factory(ui::ContextFactory* context_factory) {
     context_factory_ = context_factory;
   }
   ui::ContextFactory* context_factory() { return context_factory_; }
 
   // See CreateInstance() for description.
   void SetWindowTreeClient(WindowTreeClient* window_tree_client);
+  bool HasWindowTreeClient() const { return window_tree_client_ != nullptr; }
 
   // Sets the active FocusClient and the window the FocusClient is associated
   // with. |window| is not necessarily the window that actually has focus.
   // |window| may be null, which indicates all windows share a FocusClient.
   void SetActiveFocusClient(client::FocusClient* focus_client,
                             Window* focus_client_root);
   client::FocusClient* active_focus_client() { return active_focus_client_; }
   Window* active_focus_client_root() { return active_focus_client_root_; }
 
  private:
@@ skipping 45 matching lines @@
   client::FocusClient* active_focus_client_ = nullptr;
   std::unique_ptr<ActiveFocusClientWindowObserver>
       active_focus_client_window_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(Env);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_ENV_H_