Queued ClearBlackList() shouldn't use weak pointer.

components/previews/core/previews_black_list.cc

 // Copyright 2016 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/previews/core/previews_black_list.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/optional.h"
 #include "base/time/clock.h"
@@ skipping 71 matching lines @@
                                        base::Time end_time) {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK_LE(begin_time, end_time);
   // If the |black_list_item_map_| has been loaded from |opt_out_store_|,
   // synchronous operations will be accurate. Otherwise, queue the task to run
   // asynchronously.
   if (loaded_) {
     ClearBlackListSync(begin_time, end_time);
   } else {
     QueuePendingTask(base::Bind(&PreviewsBlackList::ClearBlackListSync,
-                                weak_factory_.GetWeakPtr(), begin_time,
-                                end_time));
+                                base::Unretained(this), begin_time, end_time));
   }
 }
 
 void PreviewsBlackList::ClearBlackListSync(base::Time begin_time,
                                            base::Time end_time) {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(loaded_);
   DCHECK_LE(begin_time, end_time);
   black_list_item_map_.reset(nullptr);
   loaded_ = false;
@@ skipping 70 matching lines @@
     }
     if (iter->second->most_recent_opt_out_time().value() < oldest_opt_out) {
       oldest_opt_out = iter->second->most_recent_opt_out_time().value();
       item_to_delete = iter;
     }
   }
   black_list_item_map_->erase(item_to_delete);
 }
 
 }  // namespace previews