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

base/threading/simple_thread.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 "base/threading/simple_thread.h"
 
 #include "base/logging.h"
-#include "base/platform_thread.h"
+#include "base/threading/platform_thread.h"
 #include "base/string_number_conversions.h"
 
 namespace base {
 
 void SimpleThread::Start() {
   DCHECK(!HasBeenStarted()) << "Tried to Start a thread multiple times.";
   bool success = PlatformThread::Create(options_.stack_size(), this, &thread_);
   CHECK(success);
   event_.Wait();  // Wait for the thread to complete initialization.
 }
@@ skipping 124 matching lines @@
 
     // A NULL delegate pointer signals us to quit.
     if (!work)
       break;
 
     work->Run();
   }
 }
 
 }  // namespace base