Move platform_thread to base/threading and put in the base namespace. I left a
stub and "using" declarations in the old location to avoid having to change the
entire project at once.

TEST=it compiles
BUG=none
Review URL: http://codereview.chromium.org/6001010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@70342 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: ce072a7181ea5d58133e33654133236f5d9f5551
diff --git a/base/file_util_unittest.cc b/base/file_util_unittest.cc
index cb77828..4aaed90 100644
--- a/base/file_util_unittest.cc
+++ b/base/file_util_unittest.cc
@@ -19,9 +19,9 @@
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
-#include "base/platform_thread.h"
 #include "base/scoped_handle.h"
 #include "base/scoped_temp_dir.h"
+#include "base/threading/platform_thread.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -347,11 +347,11 @@
 
   // Age to perfection
 #if defined(OS_WIN)
-  PlatformThread::Sleep(100);
+  base::PlatformThread::Sleep(100);
 #elif defined(OS_POSIX)
   // We need to wait at least one second here because the precision of
   // file creation time is one second.
-  PlatformThread::Sleep(1500);
+  base::PlatformThread::Sleep(1500);
 #endif
 
   // Establish our cutoff time