Move sequenced_task_runner to base/task

base/prefs/json_pref_store.cc

 // 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 "base/prefs/json_pref_store.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/file_util.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop_proxy.h"
-#include "base/sequenced_task_runner.h"
+#include "base/task/sequenced_task_runner.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "base/values.h"
 
 namespace {
 
 // Some extensions we'll tack on to copies of the Preferences files.
 const base::FilePath::CharType* kBadExtension = FILE_PATH_LITERAL("bad");
 
 // Differentiates file loading between origin thread and passed
 // (aka file) thread.
@@ skipping 321 matching lines @@
         copy->Set(key, new base::ListValue);
     } else if (value->IsType(base::Value::TYPE_DICTIONARY)) {
       const base::DictionaryValue* dict = NULL;
       if (value->GetAsDictionary(&dict) && dict->empty())
         copy->Set(key, new base::DictionaryValue);
     }
   }
 
   return serializer.Serialize(*(copy.get()));
 }