mus: Introduce high-contrast mode in mus.

services/ui/ws/window_server.h

 // 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.
 
 #ifndef SERVICES_UI_WS_WINDOW_SERVER_H_
 #define SERVICES_UI_WS_WINDOW_SERVER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 125 matching lines @@
   WindowManagerWindowTreeFactorySet* window_manager_window_tree_factory_set() {
     return &window_manager_window_tree_factory_set_;
   }
 
   // Sets focus to |window|. Returns true if |window| already has focus, or
   // focus was successfully changed. Returns |false| if |window| is not a valid
   // window to receive focus.
   bool SetFocusedWindow(ServerWindow* window);
   ServerWindow* GetFocusedWindow();
 
+  bool is_in_high_contrast_mode() const { return is_in_high_contrast_mode_; }
+  void SetHighContrastMode(bool enabled);
+
   // Returns a change id for the window manager that is associated with
   // |source| and |client_change_id|. When the window manager replies
   // WindowManagerChangeCompleted() is called to obtain the original source
   // and client supplied change_id that initiated the called.
   uint32_t GenerateWindowManagerChangeId(WindowTree* source,
                                          uint32_t client_change_id);
 
   // Called when a response from the window manager is obtained. Calls to
   // the client that initiated the change with the change id originally
   // supplied by the client.
@@ skipping 170 matching lines @@
   std::unique_ptr<CurrentMoveLoopState> current_move_loop_;
 
   // Set of WindowTrees.
   WindowTreeMap tree_map_;
 
   // If non-null then we're processing a client operation. The Operation is
   // not owned by us (it's created on the stack by WindowTree).
   Operation* current_operation_;
 
   bool in_destructor_;
+  bool is_in_high_contrast_mode_ = false;
 
   // Maps from window manager change id to the client that initiated the
   // request.
   InFlightWindowManagerChangeMap in_flight_wm_change_map_;
 
   // Next id supplied to the window manager.
   uint32_t next_wm_change_id_;
 
   base::Callback<void(ServerWindow*)> window_paint_callback_;
 
   UserActivityMonitorMap activity_monitor_map_;
 
   WindowManagerWindowTreeFactorySet window_manager_window_tree_factory_set_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowServer);
 };
 
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_WINDOW_SERVER_H_