Fix remaining incompatibilities between scoped_ptr and unique_ptr.

ash/wm/window_state.h

 // Copyright 2013 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_WM_WINDOW_STATE_H_
 #define ASH_WM_WINDOW_STATE_H_
 
 #include "ash/ash_export.h"
 #include "ash/wm/drag_details.h"
 #include "ash/wm/wm_types.h"
@@ skipping 213 matching lines @@
     return pre_auto_manage_window_bounds_.get();
   }
   void SetPreAutoManageWindowBounds(const gfx::Rect& bounds);
 
   // Layout related properties
 
   void AddObserver(WindowStateObserver* observer);
   void RemoveObserver(WindowStateObserver* observer);
 
   // Whether the window is being dragged.
-  bool is_dragged() const {
-    return drag_details_;
-  }
+  bool is_dragged() const { return !!drag_details_; }
 
   // Whether or not the window's position can be managed by the
   // auto management logic.
   bool window_position_managed() const { return window_position_managed_; }
   void set_window_position_managed(bool window_position_managed) {
     window_position_managed_ = window_position_managed;
   }
 
   // Whether or not the window's position or size was changed by a user.
   bool bounds_changed_by_user() const { return bounds_changed_by_user_; }
@@ skipping 157 matching lines @@
 ASH_EXPORT WindowState* GetWindowState(aura::Window* window);
 
 // const version of GetWindowState.
 ASH_EXPORT const WindowState*
 GetWindowState(const aura::Window* window);
 
 }  // namespace wm
 }  // namespace ash
 
 #endif  // ASH_WM_WINDOW_STATE_H_