Convert //ash from scoped_ptr to std::unique_ptr

ash/wm/dock/docked_window_layout_manager.cc

 // Copyright (c) 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.
 
 #include "ash/wm/dock/docked_window_layout_manager.h"
 
 #include "ash/screen_util.h"
 #include "ash/shelf/shelf.h"
 #include "ash/shelf/shelf_constants.h"
 #include "ash/shelf/shelf_layout_manager.h"
@@ skipping 144 matching lines @@
   // Transitions to |visible_background_type_| if the widget is visible and to
   // SHELF_BACKGROUND_DEFAULT if it is not.
   void UpdateBackground() {
     ShelfBackgroundType background_type = IsVisible() ?
         visible_background_type_ : SHELF_BACKGROUND_DEFAULT;
     BackgroundAnimatorChangeType change_type = IsVisible() ?
         visible_background_change_type_ : BACKGROUND_CHANGE_IMMEDIATE;
 
     float target_opacity =
         (background_type == SHELF_BACKGROUND_MAXIMIZED) ? 1.0f : 0.0f;
-    scoped_ptr<ui::ScopedLayerAnimationSettings> opaque_background_animation;
+    std::unique_ptr<ui::ScopedLayerAnimationSettings>
+        opaque_background_animation;
     if (change_type != BACKGROUND_CHANGE_IMMEDIATE) {
       opaque_background_animation.reset(new ui::ScopedLayerAnimationSettings(
           opaque_background_.GetAnimator()));
       opaque_background_animation->SetTransitionDuration(
           base::TimeDelta::FromMilliseconds(kTimeToSwitchBackgroundMs));
     }
     opaque_background_.SetOpacity(target_opacity);
 
     // TODO(varkha): use ui::Layer on both opaque_background and normal
     // background retire background_animator_ at all. It would be simpler.
@@ skipping 1182 matching lines @@
 
 void DockedWindowLayoutManager::OnKeyboardBoundsChanging(
     const gfx::Rect& keyboard_bounds) {
   // This bounds change will have caused a change to the Shelf which does not
   // propagate automatically to this class, so manually recalculate bounds.
   Relayout();
   UpdateDockBounds(DockedWindowLayoutManagerObserver::KEYBOARD_BOUNDS_CHANGING);
 }
 
 }  // namespace ash