Move Mutex and Monitor from vm/ to platform/

runtime/vm/thread_macos.h

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_THREAD_MACOS_H_
 #define VM_THREAD_MACOS_H_
 
 #include <pthread.h>
 
 #include "vm/globals.h"
 
 namespace dart {
 
 class ThreadData {
  private:
   ThreadData() {}
   ~ThreadData() {}
 
   pthread_t* tid() { return &tid_; }
 
   pthread_t tid_;
 
   friend class Thread;
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(ThreadData);
 };
 
-
-class MutexData {
- private:
-  MutexData() {}
-  ~MutexData() {}
-
-  pthread_mutex_t* mutex() { return &mutex_; }
-
-  pthread_mutex_t mutex_;
-
-  friend class Mutex;
-
-  DISALLOW_ALLOCATION();
-  DISALLOW_COPY_AND_ASSIGN(MutexData);
-};
-
-
-class MonitorData {
- private:
-  MonitorData() {}
-  ~MonitorData() {}
-
-  pthread_mutex_t* mutex() { return &mutex_; }
-  pthread_cond_t* cond() { return &cond_; }
-
-  pthread_mutex_t mutex_;
-  pthread_cond_t cond_;
-
-  friend class Monitor;
-
-  DISALLOW_ALLOCATION();
-  DISALLOW_COPY_AND_ASSIGN(MonitorData);
-};
-
 }  // namespace dart
 
 #endif  // VM_THREAD_MACOS_H_