mus: Introduce high-contrast mode in mus.

services/ui/ws/accessibility_manager.h

+// Copyright 2016 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_ACCESSIBILITY_MANAGER_H_
+#define SERVICES_UI_WS_ACCESSIBILITY_MANAGER_H_
+
+#include "mojo/public/cpp/bindings/binding.h"
+#include "services/ui/public/interfaces/accessibility_manager.mojom.h"
+#include "services/ui/ws/user_id.h"
+
+namespace ui {
+namespace ws {
+
+class WindowServer;
+
+class AccessibilityManager : public mojom::AccessibilityManager {
+ public:
+  AccessibilityManager(WindowServer* window_server, const UserId& user);
+  ~AccessibilityManager() override;
+
+  void Bind(mojom::AccessibilityManagerRequest request);
+
+ private:
+  // mojom::AccessibilityManager:
+  void SetHighContrastMode(bool enabled) override;
+
+  WindowServer* window_server_;
+  const UserId user_;
+  mojo::Binding<mojom::AccessibilityManager> binding_;
+
+  DISALLOW_COPY_AND_ASSIGN(AccessibilityManager);
+};
+
+}  // namespace ws
+}  // namespace ui
+
+#endif  // SERVICES_UI_WS_ACCESSIBILITY_MANAGER_H_