base::ListValue::Append cleanup: pass unique_ptr instead of the released pointer.

components/bookmarks/managed/managed_bookmarks_tracker_unittest.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/bookmarks/managed/managed_bookmarks_tracker.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 221 matching lines @@
 }
 
 TEST_F(ManagedBookmarksTrackerTest, SwapNodes) {
   prefs_.SetManagedPref(prefs::kManagedBookmarks, CreateTestTree());
   CreateModel(false /* is_supervised */);
 
   // Swap the Google bookmark with the Folder.
   std::unique_ptr<base::ListValue> updated(CreateTestTree());
   std::unique_ptr<base::Value> removed;
   ASSERT_TRUE(updated->Remove(0, &removed));
-  updated->Append(removed.release());
+  updated->Append(std::move(removed));
 
   // These two nodes should just be swapped.
   const BookmarkNode* parent = managed_node();
   EXPECT_CALL(observer_, BookmarkNodeMoved(model_.get(), parent, 1, parent, 0));
   prefs_.SetManagedPref(prefs::kManagedBookmarks, updated->DeepCopy());
   Mock::VerifyAndClearExpectations(&observer_);
 
   // Verify the final tree.
   std::unique_ptr<base::DictionaryValue> expected(
       CreateFolder(GetManagedFolderTitle(), updated.release()));
@@ skipping 98 matching lines @@
   Mock::VerifyAndClearExpectations(&observer_);
 
   EXPECT_CALL(observer_, BookmarkAllUserNodesRemoved(model_.get(), _));
   model_->RemoveAllUserBookmarks();
   EXPECT_EQ(2, managed_node()->child_count());
   EXPECT_EQ(0, model_->bookmark_bar_node()->child_count());
   Mock::VerifyAndClearExpectations(&observer_);
 }
 
 }  // namespace bookmarks