Add WorkerPool::PostTaskAndReply and use in DHCP code.

base/threading/post_task_and_reply_impl.cc

 // Copyright (c) 2011 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/message_loop_proxy.h"
+#include "base/threading/post_task_and_reply_impl.h"
 
 #include "base/bind.h"
 #include "base/location.h"
+#include "base/message_loop_proxy.h"
 
 namespace base {
 
 namespace {
 
 // This relay class remembers the MessageLoop that it was created on, and
 // ensures that both the |task| and |reply| Closures are deleted on this same
 // thread. Also, |task| is guaranteed to be deleted before |reply| is run or
 // deleted.
 //
@@ skipping 41 matching lines @@
   }
 
   tracked_objects::Location from_here_;
   scoped_refptr<MessageLoopProxy> origin_loop_;
   Closure reply_;
   Closure task_;
 };
 
 }  // namespace
 
-MessageLoopProxy::MessageLoopProxy() {
-}
+namespace internal {
 
-MessageLoopProxy::~MessageLoopProxy() {
-}
-
-bool MessageLoopProxy::PostTaskAndReply(
+bool PostTaskAndReplyImpl::PostTaskAndReply(
     const tracked_objects::Location& from_here,
     const Closure& task,
     const Closure& reply) {
   PostTaskAndReplyRelay* relay =
       new PostTaskAndReplyRelay(from_here, task, reply);
   if (!PostTask(from_here, Bind(&PostTaskAndReplyRelay::Run,
                                 Unretained(relay)))) {
     delete relay;
     return false;
   }
 
   return true;
 }
 
-void MessageLoopProxy::OnDestruct() const {
-  delete this;
-}
+}  // namespace internal
 
 }  // namespace base