Convert //ash from scoped_ptr to std::unique_ptr

ash/wm/overview/window_grid.cc

 // 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.
 
 #include "ash/wm/overview/window_grid.h"
 
 #include <algorithm>
 #include <functional>
 #include <set>
 #include <utility>
@@ skipping 26 matching lines @@
 namespace {
 
 typedef std::vector<aura::Window*> Windows;
 
 // An observer which holds onto the passed widget until the animation is
 // complete.
 class CleanupWidgetAfterAnimationObserver
     : public ui::ImplicitAnimationObserver {
  public:
   explicit CleanupWidgetAfterAnimationObserver(
-      scoped_ptr<views::Widget> widget);
+      std::unique_ptr<views::Widget> widget);
   ~CleanupWidgetAfterAnimationObserver() override;
 
   // ui::ImplicitAnimationObserver:
   void OnImplicitAnimationsCompleted() override;
 
  private:
-  scoped_ptr<views::Widget> widget_;
+  std::unique_ptr<views::Widget> widget_;
 
   DISALLOW_COPY_AND_ASSIGN(CleanupWidgetAfterAnimationObserver);
 };
 
 CleanupWidgetAfterAnimationObserver::CleanupWidgetAfterAnimationObserver(
-    scoped_ptr<views::Widget> widget)
+    std::unique_ptr<views::Widget> widget)
     : widget_(std::move(widget)) {}
 
 CleanupWidgetAfterAnimationObserver::~CleanupWidgetAfterAnimationObserver() {
 }
 
 void CleanupWidgetAfterAnimationObserver::OnImplicitAnimationsCompleted() {
   delete this;
 }
 
 // A comparator for locating a given target window.
@@ skipping 435 matching lines @@
         ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
     selection_widget_->SetBounds(SelectedWindow()->target_bounds());
     selection_widget_->SetOpacity(255);
     return;
   }
   selection_widget_->SetBounds(SelectedWindow()->target_bounds());
   selection_widget_->SetOpacity(255);
 }
 
 }  // namespace ash