Replace more ObserverList with base::ObserverList.

content/child/worker_task_runner.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 "content/child/worker_task_runner.h"
 
 #include "base/callback.h"
 #include "base/lazy_instance.h"
 #include "base/location.h"
 #include "base/logging.h"
@@ skipping 21 matching lines @@
     return false;
   }
 
   bool RunsTasksOnCurrentThread() const override { return false; }
 };
 
 }  // namespace
 
 struct WorkerTaskRunner::ThreadLocalState {
   ThreadLocalState() {}
-  ObserverList<WorkerTaskRunner::Observer> stop_observers_;
+  base::ObserverList<WorkerTaskRunner::Observer> stop_observers_;
 };
 
 WorkerTaskRunner::WorkerTaskRunner()
     : task_runner_for_dead_worker_(new DoNothingTaskRunner()) {
 }
 
 bool WorkerTaskRunner::PostTask(
     int id, const base::Closure& closure) {
   DCHECK(id > 0);
   base::AutoLock locker(task_runner_map_lock_);
@@ skipping 58 matching lines @@
   current_tls_.Set(NULL);
 }
 
 base::TaskRunner* WorkerTaskRunner::GetTaskRunnerFor(int worker_id) {
   base::AutoLock locker(task_runner_map_lock_);
   return ContainsKey(task_runner_map_, worker_id) ? task_runner_map_[worker_id]
                                            : task_runner_for_dead_worker_.get();
 }
 
 }  // namespace content