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

components/bookmarks/managed/managed_bookmarks_tracker_unittest.cc

Index: components/bookmarks/managed/managed_bookmarks_tracker_unittest.cc
diff --git a/components/bookmarks/managed/managed_bookmarks_tracker_unittest.cc b/components/bookmarks/managed/managed_bookmarks_tracker_unittest.cc
index b880b8fbe17b1cbffe640de47c5ff8a4d0c1757a..8e6245c283524bc45e5d90893199deef6e00e3ff 100644
--- a/components/bookmarks/managed/managed_bookmarks_tracker_unittest.cc
+++ b/components/bookmarks/managed/managed_bookmarks_tracker_unittest.cc
@@ -239,7 +239,7 @@ TEST_F(ManagedBookmarksTrackerTest, SwapNodes) {
   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();