Convert //ash from scoped_ptr to std::unique_ptr

ash/wm/workspace/phantom_window_controller.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/wm/workspace/phantom_window_controller.h"
 
 #include <math.h>
 
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
@@ skipping 85 matching lines @@
   start_bounds_in_screen.Inset(
       floor((start_bounds_in_screen.width() - start_width) / 2.0f),
       floor((start_bounds_in_screen.height() - start_height) / 2.0f));
   phantom_widget_ = CreatePhantomWidget(
       wm::GetRootWindowMatching(target_bounds_in_screen_),
       start_bounds_in_screen);
 
   AnimateToBounds(phantom_widget_.get(), target_bounds_in_screen_);
 }
 
-scoped_ptr<views::Widget> PhantomWindowController::CreatePhantomWidget(
+std::unique_ptr<views::Widget> PhantomWindowController::CreatePhantomWidget(
     aura::Window* root_window,
     const gfx::Rect& bounds_in_screen) {
-  scoped_ptr<views::Widget> phantom_widget(new views::Widget);
+  std::unique_ptr<views::Widget> phantom_widget(new views::Widget);
   views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
   params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
   // PhantomWindowController is used by FrameMaximizeButton to highlight the
   // launcher button. Put the phantom in the same window as the launcher so that
   // the phantom is visible.
   params.parent = Shell::GetContainer(root_window,
                                       kShellWindowId_ShelfContainer);
   params.keep_on_top = true;
   params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
   phantom_widget->set_focus_on_creation(false);
@@ skipping 20 matching lines @@
   widget_layer->SetOpacity(0);
   ui::ScopedLayerAnimationSettings scoped_setter(widget_layer->GetAnimator());
   scoped_setter.SetTransitionDuration(
       base::TimeDelta::FromMilliseconds(kAnimationDurationMs));
   widget_layer->SetOpacity(1);
 
   return phantom_widget;
 }
 
 }  // namespace ash