FocusManagerFactory::Create() should return a unique_ptr.

ash/accelerators/ash_focus_manager_factory.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_ACCELERATORS_ASH_FOCUS_MANAGER_FACTORY_H_
 #define ASH_ACCELERATORS_ASH_FOCUS_MANAGER_FACTORY_H_
 
 #include "base/macros.h"
 #include "ui/views/focus/focus_manager_delegate.h"
 #include "ui/views/focus/focus_manager_factory.h"
 
 namespace ash {
 
 // A factory class for creating a custom views::FocusManager object which
 // supports Ash shortcuts.
 class AshFocusManagerFactory : public views::FocusManagerFactory {
  public:
   AshFocusManagerFactory();
   ~AshFocusManagerFactory() override;
 
  protected:
   // views::FocusManagerFactory overrides:
-  views::FocusManager* CreateFocusManager(views::Widget* widget,
-                                          bool desktop_widget) override;
+  std::unique_ptr<views::FocusManager> CreateFocusManager(
+      views::Widget* widget,
+      bool desktop_widget) override;
 
  private:
   class Delegate : public views::FocusManagerDelegate {
    public:
+    Delegate();
+    ~Delegate() override;
+
     // views::FocusManagerDelegate overrides:
     bool ProcessAccelerator(const ui::Accelerator& accelerator) override;
   };
 
   DISALLOW_COPY_AND_ASSIGN(AshFocusManagerFactory);
 };
 
 }  // namespace ash
 
 #endif  // ASH_ACCELERATORS_ASH_FOCUS_MANAGER_FACTORY_H_