Convert //ash from scoped_ptr to std::unique_ptr

ash/system/tray/system_tray.cc

 // 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.
 
 #include "ash/system/tray/system_tray.h"
 
 #include "ash/ash_switches.h"
 #include "ash/metrics/user_metrics_recorder.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shell.h"
@@ skipping 99 matching lines @@
 
   // Convenience accessors:
   SystemTrayBubble* bubble() const { return bubble_.get(); }
   SystemTrayBubble::BubbleType bubble_type() const {
     return bubble_->bubble_type();
   }
   TrayBubbleView* bubble_view() const { return bubble_->bubble_view(); }
   bool is_persistent() const { return is_persistent_; }
 
  private:
-  scoped_ptr<SystemTrayBubble> bubble_;
-  scoped_ptr<TrayBubbleWrapper> bubble_wrapper_;
+  std::unique_ptr<SystemTrayBubble> bubble_;
+  std::unique_ptr<TrayBubbleWrapper> bubble_wrapper_;
   bool is_persistent_;
 
   DISALLOW_COPY_AND_ASSIGN(SystemBubbleWrapper);
 };
 
 
 // SystemTray
 
 SystemTray::SystemTray(StatusAreaWidget* status_area_widget)
     : TrayBackgroundView(status_area_widget),
@@ skipping 600 matching lines @@
   system_bubble_.reset();
   // When closing a system bubble with the alternate shelf layout, we need to
   // turn off the active tinting of the shelf.
   if (full_system_tray_menu_) {
     SetDrawBackgroundAsActive(false);
     full_system_tray_menu_ = false;
   }
 }
 
 }  // namespace ash