Move platform_thread to base/threading and put in the base namespace. I left ...

chrome/worker/worker_uitest.cc

Index: chrome/worker/worker_uitest.cc
===================================================================
--- chrome/worker/worker_uitest.cc	(revision 70328)
+++ chrome/worker/worker_uitest.cc	(working copy)
@@ -1,9 +1,10 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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/file_path.h"
 #include "base/string_util.h"
+#include "base/threading/platform_thread.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/worker_host/worker_service.h"
 #include "chrome/common/chrome_switches.h"
@@ -95,7 +96,7 @@
       if (cur_process_count == number_of_processes)
         return true;
 
-      PlatformThread::Sleep(sleep_timeout_ms() / 10);
+      base::PlatformThread::Sleep(sleep_timeout_ms() / 10);
     }
 
     EXPECT_EQ(number_of_processes, cur_process_count);