Convert //chrome/browser/ui from scoped_ptr to std::unique_ptr

chrome/browser/ui/cocoa/constrained_window/constrained_window_mac.mm

 // 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 "chrome/browser/ui/cocoa/constrained_window/constrained_window_mac.h"
 
+#include <memory>
 #include <utility>
 
 #include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
 #import "chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet.h"
 #import "chrome/browser/ui/cocoa/single_web_contents_dialog_manager_cocoa.h"
 #include "components/guest_view/browser/guest_view_base.h"
 #include "content/public/browser/browser_thread.h"
 
 using web_modal::WebContentsModalDialogManager;
 
-scoped_ptr<ConstrainedWindowMac> CreateAndShowWebModalDialogMac(
+std::unique_ptr<ConstrainedWindowMac> CreateAndShowWebModalDialogMac(
     ConstrainedWindowMacDelegate* delegate,
     content::WebContents* web_contents,
     id<ConstrainedWindowSheet> sheet) {
   ConstrainedWindowMac* window =
       new ConstrainedWindowMac(delegate, web_contents, sheet);
   window->ShowWebContentsModalDialog();
-  return scoped_ptr<ConstrainedWindowMac>(window);
+  return std::unique_ptr<ConstrainedWindowMac>(window);
 }
 
-scoped_ptr<ConstrainedWindowMac> CreateWebModalDialogMac(
+std::unique_ptr<ConstrainedWindowMac> CreateWebModalDialogMac(
     ConstrainedWindowMacDelegate* delegate,
     content::WebContents* web_contents,
     id<ConstrainedWindowSheet> sheet) {
-  return scoped_ptr<ConstrainedWindowMac>(
+  return std::unique_ptr<ConstrainedWindowMac>(
       new ConstrainedWindowMac(delegate, web_contents, sheet));
 }
 
 ConstrainedWindowMac::ConstrainedWindowMac(
     ConstrainedWindowMacDelegate* delegate,
     content::WebContents* web_contents,
     id<ConstrainedWindowSheet> sheet)
     : delegate_(delegate),
       sheet_([sheet retain]) {
   DCHECK(sheet);
 
   // |web_contents| may be embedded within a chain of nested GuestViews. If it
   // is, follow the chain of embedders to the outermost WebContents and use it.
   web_contents_ =
       guest_view::GuestViewBase::GetTopLevelWebContents(web_contents);
 
   native_manager_.reset(
       new SingleWebContentsDialogManagerCocoa(this, sheet_.get(),
                                               GetDialogManager()));
 }
 
 ConstrainedWindowMac::~ConstrainedWindowMac() {
   CHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   native_manager_.reset();
   DCHECK(!manager_);
 }
 
 void ConstrainedWindowMac::ShowWebContentsModalDialog() {
-  scoped_ptr<SingleWebContentsDialogManagerCocoa> dialog_manager;
+  std::unique_ptr<SingleWebContentsDialogManagerCocoa> dialog_manager;
   dialog_manager.reset(native_manager_.release());
   GetDialogManager()->ShowDialogWithManager(
       [sheet_.get() sheetWindow], std::move(dialog_manager));
 }
 
 void ConstrainedWindowMac::CloseWebContentsModalDialog() {
   if (manager_)
     manager_->Close();
 }
 
 void ConstrainedWindowMac::OnDialogClosing() {
   if (delegate_)
     delegate_->OnConstrainedWindowClosed(this);
 }
 
 bool ConstrainedWindowMac::DialogWasShown() {
   // If the dialog was shown, |native_manager_| would have been released.
   return !native_manager_;
 }
 
 WebContentsModalDialogManager* ConstrainedWindowMac::GetDialogManager() {
   DCHECK(web_contents_);
   return WebContentsModalDialogManager::FromWebContents(web_contents_);
 }