Move some misc thread-related stuff from base to base/thread and into the bas...

net/disk_cache/backend_impl.cc

Index: net/disk_cache/backend_impl.cc
===================================================================
--- net/disk_cache/backend_impl.cc	(revision 70312)
+++ net/disk_cache/backend_impl.cc	(working copy)
@@ -13,10 +13,10 @@
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/sys_info.h"
+#include "base/threading/worker_pool.h"
 #include "base/thread_restrictions.h"
 #include "base/time.h"
 #include "base/timer.h"
-#include "base/worker_pool.h"
 #include "net/base/net_errors.h"
 #include "net/disk_cache/cache_util.h"
 #include "net/disk_cache/entry_impl.h"
@@ -142,7 +142,7 @@
     return false;
   }
 
-  WorkerPool::PostTask(FROM_HERE, new CleanupTask(path, name_str), true);
+  base::WorkerPool::PostTask(FROM_HERE, new CleanupTask(path, name_str), true);
   return true;
 }