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
diff --git a/base/time_unittest.cc b/base/time_unittest.cc
index 6ddf4d3..6c64b48 100644
--- a/base/time_unittest.cc
+++ b/base/time_unittest.cc
@@ -1,10 +1,10 @@
-// Copyright (c) 2006-2008 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 <time.h>
 
-#include "base/platform_thread.h"
+#include "base/threading/platform_thread.h"
 #include "base/time.h"
 #include "build/build_config.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -106,7 +106,7 @@
 TEST(TimeTicks, Deltas) {
   for (int index = 0; index < 50; index++) {
     TimeTicks ticks_start = TimeTicks::Now();
-    PlatformThread::Sleep(10);
+    base::PlatformThread::Sleep(10);
     TimeTicks ticks_stop = TimeTicks::Now();
     TimeDelta delta = ticks_stop - ticks_start;
     // Note:  Although we asked for a 10ms sleep, if the