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

base/threading/platform_thread_win.cc

Index: base/threading/platform_thread_win.cc
===================================================================
--- base/threading/platform_thread_win.cc	(revision 70321)
+++ base/threading/platform_thread_win.cc	(working copy)
@@ -2,12 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "base/platform_thread.h"
+#include "base/threading/platform_thread.h"
 
 #include "base/logging.h"
 #include "base/thread_restrictions.h"
 #include "base/win/windows_version.h"
 
+namespace base {
+
 namespace {
 
 // The information on how to set the thread name comes from
@@ -141,3 +143,5 @@
 
   CloseHandle(thread_handle);
 }
+
+}  // namespace base