Reduce usage of MessageLoopProxy in base/

base/threading/worker_pool.h

Index: base/threading/worker_pool.h
diff --git a/base/threading/worker_pool.h b/base/threading/worker_pool.h
index 333b4950f6baba82f17d6aa54cb5ec3db785a575..2bb986ff1ed1dd9c72514b2bc93c3773fc235b79 100644
--- a/base/threading/worker_pool.h
+++ b/base/threading/worker_pool.h
@@ -36,9 +36,9 @@ class BASE_EXPORT WorkerPool {
   static bool PostTask(const tracked_objects::Location& from_here,
                        const base::Closure& task, bool task_is_slow);
 
-  // Just like MessageLoopProxy::PostTaskAndReply, except the destination
-  // for |task| is a worker thread and you can specify |task_is_slow| just
-  // like you can for PostTask above.
+  // Just like TaskRunner::PostTaskAndReply, except the destination for |task|
+  // is a worker thread and you can specify |task_is_slow| just like you can
+  // for PostTask above.
   static bool PostTaskAndReply(const tracked_objects::Location& from_here,
                                const Closure& task,
                                const Closure& reply,