Add WorkerPool::PostTaskAndReply and use in DHCP code.

base/threading/worker_pool_win.cc

Index: base/threading/worker_pool_win.cc
diff --git a/base/threading/worker_pool_win.cc b/base/threading/worker_pool_win.cc
index b7eaad1b46fea6594c00c723224fdfaaefccfdb8..79589e132f3fb7457435354adba887c6ffd2f868 100644
--- a/base/threading/worker_pool_win.cc
+++ b/base/threading/worker_pool_win.cc
@@ -8,6 +8,7 @@
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/task.h"
+#include "base/threading/post_task_and_reply_impl.h"
 #include "base/tracked_objects.h"
 
 namespace base {
@@ -71,6 +72,20 @@ bool PostTaskInternal(PendingTask* pending_task, bool task_is_slow) {
   return true;
 }
 
+class PostTaskAndReplyWorkerPool : public PostTaskAndReplyImpl {
+public:
+  PostTaskAndReplyWorkerPool(bool task_is_slow) : task_is_slow_(task_is_slow) {
+  }
+
+  bool PostTask(const tracked_objects::Location& from_here,
+                const Closure& task) {
+    return WorkerPool::PostTask(from_here, task, task_is_slow_);
+  }
+
+private:
+  bool task_is_slow_;
+};
+
 }  // namespace
 
 bool WorkerPool::PostTask(const tracked_objects::Location& from_here,
@@ -88,4 +103,12 @@ bool WorkerPool::PostTask(const tracked_objects::Location& from_here,
   return PostTaskInternal(pending_task, task_is_slow);
 }
 
+bool WorkerPool::PostTaskAndReply(const tracked_objects::Location& from_here,
+                                  const Closure& task,
+                                  const Closure& reply,
+                                  bool task_is_slow) {
+  return PostTaskAndReplyWorkerPool(task_is_slow).PostTaskAndReply(
+      from_here, task, reply);

[awong, 2011/10/05 17:27:01]

Yeah, if PostTaskAndReply were in a header file, this could just be

PostTAskAndReply relay = new PostTaskAndReply(from_here, task, reply);

return PostTask(from_here, base::Bind(&PostTaskAndReply::Run,
base::Unretained(relay), task_is_slow));

+}
+
 }  // namespace base