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

net/proxy/multi_threaded_proxy_resolver_unittest.cc

Index: net/proxy/multi_threaded_proxy_resolver_unittest.cc
===================================================================
--- net/proxy/multi_threaded_proxy_resolver_unittest.cc	(revision 70328)
+++ net/proxy/multi_threaded_proxy_resolver_unittest.cc	(working copy)
@@ -1,4 +1,4 @@
-// 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.
 
@@ -7,6 +7,7 @@
 #include "base/stl_util-inl.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
+#include "base/threading/platform_thread.h"
 #include "base/utf_string_conversions.h"
 #include "base/waitable_event.h"
 #include "googleurl/src/gurl.h"
@@ -40,7 +41,7 @@
                              RequestHandle* request,
                              const BoundNetLog& net_log) {
     if (resolve_latency_ms_)
-      PlatformThread::Sleep(resolve_latency_ms_);
+      base::PlatformThread::Sleep(resolve_latency_ms_);
 
     CheckIsOnWorkerThread();