Use std::unique_ptr instead of linked_ptr in //components/guest_view

components/guest_view/browser/test_guest_view_manager.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 "components/guest_view/browser/test_guest_view_manager.h"
 
 #include <utility>
 
+#include "base/memory/ptr_util.h"
 #include "components/guest_view/browser/guest_view_manager_delegate.h"
 
 namespace guest_view {
 
 TestGuestViewManager::TestGuestViewManager(
     content::BrowserContext* context,
     std::unique_ptr<GuestViewManagerDelegate> delegate)
     : GuestViewManager(context, std::move(delegate)),
       num_embedder_processes_destroyed_(0),
       num_guests_created_(0),
@@ skipping 70 matching lines @@
 void TestGuestViewManager::WaitForSingleViewGarbageCollected() {
   if (!num_views_garbage_collected())
     WaitForViewGarbageCollected();
 }
 
 void TestGuestViewManager::AddGuest(int guest_instance_id,
                                     content::WebContents* guest_web_contents) {
   GuestViewManager::AddGuest(guest_instance_id, guest_web_contents);
 
   guest_web_contents_watchers_.push_back(
-      linked_ptr<content::WebContentsDestroyedWatcher>(
-          new content::WebContentsDestroyedWatcher(guest_web_contents)));
+      base::MakeUnique<content::WebContentsDestroyedWatcher>(
+          guest_web_contents));
 
   if (created_message_loop_runner_.get())
     created_message_loop_runner_->Quit();
 
   ++num_guests_created_;
   if (!waiting_for_guests_created_ &&
       num_guests_created_ != expected_num_guests_created_) {
     return;
   }
 
@@ skipping 36 matching lines @@
     content::BrowserContext* context,
     std::unique_ptr<GuestViewManagerDelegate> delegate) {
   if (!test_guest_view_manager_) {
     test_guest_view_manager_ =
         new TestGuestViewManager(context, std::move(delegate));
   }
   return test_guest_view_manager_;
 }
 
 }  // namespace guest_view