mash: Port KeyboardUIMus to mojo:ash; remove sysui.

ash/shell.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 ASH_SHELL_H_
 #define ASH_SHELL_H_
 
 #include <memory>
 #include <utility>
 #include <vector>
@@ skipping 367 matching lines @@
   WindowPositioner* window_positioner() { return window_positioner_.get(); }
 
   UserMetricsRecorder* metrics() { return user_metrics_recorder_.get(); }
 
   void SetTouchHudProjectionEnabled(bool enabled);
 
   bool is_touch_hud_projection_enabled() const {
     return is_touch_hud_projection_enabled_;
   }
 
-  // TODO(sky): remove this. This was needed by sysui, but as sysui is going
-  // away it should no longer be needed.
-  bool in_mus() const { return in_mus_; }
-
 #if defined(OS_CHROMEOS)
   // Creates instance of FirstRunHelper. Caller is responsible for deleting
   // returned object.
   ash::FirstRunHelper* CreateFirstRunHelper();
 
   // Toggles cursor compositing on/off. Native cursor is disabled when cursor
   // compositing is enabled, and vice versa.
   void SetCursorCompositingEnabled(bool enabled);
 
   StickyKeysController* sticky_keys_controller() {
@@ skipping 151 matching lines @@
   // For testing only: simulate that a modal window is open
   bool simulate_modal_window_open_for_testing_;
 
   bool is_touch_hud_projection_enabled_;
 
   // Injected content::GPUDataManager support.
   std::unique_ptr<GPUSupport> gpu_support_;
 
   std::unique_ptr<ImmersiveHandlerFactoryAsh> immersive_handler_factory_;
 
-  bool in_mus_ = false;
-
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_