Introduce runtime/platform directory for code shared between vm

runtime/bin/thread_pool.h

 // 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 BIN_THREAD_POOL_H_
 #define BIN_THREAD_POOL_H_
 
 #include "bin/builtin.h"
-#include "bin/globals.h"
+
+#include "platform/globals.h"
 
 // Declare the OS-specific types ahead of defining the generic classes.
 #if defined(TARGET_OS_LINUX)
 #include "bin/thread_pool_linux.h"
 #elif defined(TARGET_OS_MACOS)
 #include "bin/thread_pool_macos.h"
 #elif defined(TARGET_OS_WINDOWS)
 #include "bin/thread_pool_win.h"
 #else
 #error Unknown target os.
@@ skipping 52 matching lines @@
   static void* Main(void* args);
 
   TaskQueue queue;
   int size_;  // Number of threads.
   ThreadPoolData data_;
 
   DISALLOW_COPY_AND_ASSIGN(ThreadPool);
 };
 
 #endif  // BIN_THREAD_POOL_H_