- Do not use size_t.

runtime/include/dart_api.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 INCLUDE_DART_API_H_
 #define INCLUDE_DART_API_H_
 
 /** \mainpage Dart Embedding API Reference
@@ skipping 706 matching lines @@
 typedef void (*Dart_FileReadCallback)(const uint8_t** data,
                                       intptr_t* file_length,
                                       void* stream);
 
 typedef void (*Dart_FileWriteCallback)(const void* data,
                                        intptr_t length,
                                        void* stream);
 
 typedef void (*Dart_FileCloseCallback)(void* stream);
 
-typedef bool (*Dart_EntropySource)(uint8_t* buffer, size_t length);
+typedef bool (*Dart_EntropySource)(uint8_t* buffer, intptr_t length);
 
 /**
  * Initializes the VM.
  *
  * \param create A function to be called during isolate creation.
  *   See Dart_IsolateCreateCallback.
  * \param interrupt A function to be called when an isolate is interrupted.
  *   See Dart_IsolateInterruptCallback.
  * \param unhandled_exception A function to be called if an isolate has an
  *   unhandled exception.  Set Dart_IsolateUnhandledExceptionCallback.
@@ skipping 1601 matching lines @@
  *
  * \param object An object.
  * \param peer A value to store in the peer field.
  *
  * \return Returns an error if 'object' is a subtype of Null, num, or
  *   bool.
  */
 DART_EXPORT Dart_Handle Dart_SetPeer(Dart_Handle object, void* peer);
 
 #endif  /* INCLUDE_DART_API_H_ */  /* NOLINT */