- Do not use size_t.

runtime/bin/dartutils.h

Index: runtime/bin/dartutils.h
===================================================================
--- runtime/bin/dartutils.h	(revision 29950)
+++ runtime/bin/dartutils.h	(working copy)
@@ -115,7 +115,7 @@
   static void ReadFile(const uint8_t** data, intptr_t* file_len, void* stream);
   static void WriteFile(const void* buffer, intptr_t num_bytes, void* stream);
   static void CloseFile(void* stream);
-  static bool EntropySource(uint8_t* buffer, size_t length);
+  static bool EntropySource(uint8_t* buffer, intptr_t length);
 
   static Dart_Handle ReadStringFromFile(const char* filename);
   static Dart_Handle ReadStringFromHttp(const char* filename);