Move AccessibilityDelegate ownership to ash::WmShell

ash/mus/accessibility_delegate_mus.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 ASH_MUS_ACCESSIBILITY_DELEGATE_MUS_H_
+#define ASH_MUS_ACCESSIBILITY_DELEGATE_MUS_H_
+
+#include "ash/common/default_accessibility_delegate.h"
+#include "base/macros.h"
+#include "services/ui/public/interfaces/accessibility_manager.mojom.h"
+
+namespace shell {
+class Connector;
+}
+
+namespace ash {
+
+class AccessibilityDelegateMus : public DefaultAccessibilityDelegate {
+ public:
+  explicit AccessibilityDelegateMus(shell::Connector* connector);
+  ~AccessibilityDelegateMus() override;
+
+ private:
+  ui::mojom::AccessibilityManager* GetAccessibilityManager();
+
+  // DefaultAccessibilityDelegate:
+  void ToggleHighContrast() override;
+
+  ui::mojom::AccessibilityManagerPtr accessibility_manager_ptr_;
+  shell::Connector* connector_;
+
+  DISALLOW_COPY_AND_ASSIGN(AccessibilityDelegateMus);
+};
+
+}  // namespace ash
+
+#endif  // ASH_MUS_ACCESSIBILITY_DELEGATE_MUS_H_