Move Mutex and Monitor from vm/ to platform/

runtime/platform/thread_macos.h

Index: runtime/platform/thread_macos.h
diff --git a/runtime/vm/thread_macos.h b/runtime/platform/thread_macos.h
similarity index 83%
rename from runtime/vm/thread_macos.h
rename to runtime/platform/thread_macos.h
index fbcec431a1d95a27af64070989c3031c98274e6b..baf5a9c292cfede3a5f1753c0ed3d12f405771c5 100644
--- a/runtime/vm/thread_macos.h
+++ b/runtime/platform/thread_macos.h
@@ -1,13 +1,13 @@
-// 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_
+#ifndef PLATFORM_THREAD_MACOS_H_
+#define PLATFORM_THREAD_MACOS_H_
 
 #include <pthread.h>
 
-#include "vm/globals.h"
+#include "platform/globals.h"
 
 namespace dart {
 
@@ -62,4 +62,4 @@ class MonitorData {
 
 }  // namespace dart
 
-#endif  // VM_THREAD_MACOS_H_
+#endif  // PLATFORM_THREAD_MACOS_H_