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

base/message_loop_unittest.cc

 // 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 <vector>
 
 #include "base/eintr_wrapper.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
-#include "base/platform_thread.h"
 #include "base/ref_counted.h"
 #include "base/task.h"
+#include "base/threading/platform_thread.h"
 #include "base/thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if defined(OS_WIN)
 #include "base/message_pump_win.h"
 #include "base/scoped_handle.h"
 #endif
 #if defined(OS_POSIX)
 #include "base/message_pump_libevent.h"
 #endif
 
+using base::PlatformThread;
 using base::Thread;
 using base::Time;
 using base::TimeDelta;
 
 // TODO(darin): Platform-specific MessageLoop tests should be grouped together
 // to avoid chopping this file up with so many #ifdefs.
 
 namespace {
 
 class MessageLoopTest : public testing::Test {};
@@ skipping 1670 matching lines @@
   loop->PostDelayedTask(
       FROM_HERE,
       new RunAtDestructionTask(&task_destroyed, &destruction_observer_called),
       kDelayMS);
   delete loop;
   EXPECT_TRUE(observer.task_destroyed_before_message_loop());
   // The task should have been destroyed when we deleted the loop.
   EXPECT_TRUE(task_destroyed);
   EXPECT_TRUE(destruction_observer_called);
 }