Convert //ash from scoped_ptr to std::unique_ptr

ash/host/ash_window_tree_host.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 ASH_HOST_ASH_WINDOW_TREE_HOST_H_
 #define ASH_HOST_ASH_WINDOW_TREE_HOST_H_
 
+#include <memory>
+
 #include "ash/ash_export.h"
 #include "base/callback_forward.h"
-#include "base/memory/scoped_ptr.h"
 
 namespace aura {
 class Window;
 class WindowTreeHost;
 }
 
 namespace gfx {
 class Insets;
 class Rect;
 }
@@ skipping 34 matching lines @@
 
   // Clips the cursor to the bounds of the root window until UnConfineCursor().
   // We would like to be able to confine the cursor to that window. However,
   // currently, we do not have such functionality in X. So we just confine
   // to the root window. This is ok because this option is currently only
   // being used in fullscreen mode, so root_window bounds = window bounds.
   virtual bool ConfineCursorToRootWindow() = 0;
   virtual void UnConfineCursor() = 0;
 
   virtual void SetRootWindowTransformer(
-      scoped_ptr<RootWindowTransformer> transformer) = 0;
+      std::unique_ptr<RootWindowTransformer> transformer) = 0;
 
   virtual gfx::Insets GetHostInsets() const = 0;
 
   virtual aura::WindowTreeHost* AsWindowTreeHost() = 0;
 
   // Stop listening for events in preparation for shutdown.
   virtual void PrepareForShutdown() {}
 
   virtual void RegisterMirroringHost(AshWindowTreeHost* mirroring_ash_host) {}
 
  protected:
   // Translates the native mouse location into screen coordinates.
   void TranslateLocatedEvent(ui::LocatedEvent* event);
 
  private:
   InputMethodEventHandler* input_method_handler_;
 };
 
 }  // namespace ash
 
 #endif  // ASH_HOST_ASH_WINDOW_TREE_HOST_H_