Add Process.runSync for running processe synchronously.

runtime/bin/io_buffer.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_IO_BUFFER_H_
 #define BIN_IO_BUFFER_H_
 
 #include "platform/globals.h"
 
 #include "include/dart_api.h"
 
 
 namespace dart {
 namespace bin {
 
 class IOBuffer {
  public:
   // Allocate an IO buffer dart object (of type Uint8List) backed by
   // an external byte array.
   static Dart_Handle Allocate(intptr_t size, uint8_t **buffer);
 
+  // Create an IO buffer backed by an external byte array. The buffer must
+  // have been allocated using the new operator and it will be freed using
+  // delete.
+  static Dart_Handle Create(uint8_t *buffer, intptr_t size);
+
   // Allocate IO buffer storage.
   static uint8_t* Allocate(intptr_t size);
 
   // Function for disposing of IO buffer storage. All backing storage
   // for IO buffers must be freed using this function.
   static void Free(void* buffer) {
     delete[] reinterpret_cast<uint8_t*>(buffer);
   }
 
   // Function for finalizing external byte arrays used as IO buffers.
   static void Finalizer(Dart_WeakPersistentHandle handle, void* buffer) {
     Free(buffer);
     if (handle != NULL) {
       Dart_DeleteWeakPersistentHandle(handle);
     }
   }
 
  private:
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(IOBuffer);
 };
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // BIN_IO_BUFFER_H_