Convert //ash from scoped_ptr to std::unique_ptr

ash/wm/workspace/workspace_layout_manager.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/workspace_layout_manager.h"
 
 #include <algorithm>
 
 #include "ash/root_window_controller.h"
 #include "ash/screen_util.h"
@@ skipping 47 matching lines @@
     (*i)->RemoveObserver(this);
   Shell::GetInstance()->RemoveShellObserver(this);
   Shell::GetInstance()->activation_client()->RemoveObserver(this);
 }
 
 void WorkspaceLayoutManager::SetShelf(ShelfLayoutManager* shelf) {
   shelf_ = shelf;
 }
 
 void WorkspaceLayoutManager::SetMaximizeBackdropDelegate(
-    scoped_ptr<WorkspaceLayoutManagerDelegate> delegate) {
+    std::unique_ptr<WorkspaceLayoutManagerDelegate> delegate) {
   backdrop_delegate_.reset(delegate.release());
 }
 
 //////////////////////////////////////////////////////////////////////////////
 // WorkspaceLayoutManager, aura::LayoutManager implementation:
 
 void WorkspaceLayoutManager::OnWindowAddedToLayout(Window* child) {
   wm::WindowState* window_state = wm::GetWindowState(child);
   wm::WMEvent event(wm::WM_EVENT_ADDED_TO_WORKSPACE);
   window_state->OnWMEvent(&event);
@@ skipping 265 matching lines @@
   bool is_fullscreen = GetRootWindowController(
       window_->GetRootWindow())->GetWindowForFullscreenMode() != NULL;
   if (is_fullscreen != is_fullscreen_) {
     ash::Shell::GetInstance()->NotifyFullscreenStateChange(
         is_fullscreen, window_->GetRootWindow());
     is_fullscreen_ = is_fullscreen;
   }
 }
 
 }  // namespace ash