Support posting of external data into dart as external uint8 arrays through the Dart API.

runtime/bin/file.h

Index: runtime/bin/file.h
diff --git a/runtime/bin/file.h b/runtime/bin/file.h
index ed292af2d636482157fb6bbb4cf5edd9bd3c63e7..7b6ea8c09653b584d514c9a6f90fcf36de2a84fb 100644
--- a/runtime/bin/file.h
+++ b/runtime/bin/file.h
@@ -148,14 +148,12 @@ class File {
   // FileHandle is an OS specific class which stores data about the file.
   FileHandle* handle_;  // OS specific handle for the file.
 
-  // DISALLOW_COPY_AND_ASSIGN(File).
-  File(const File&);
-  void operator=(const File&);
-
   static dart::Mutex mutex_;
   static int service_ports_size_;
   static Dart_Port* service_ports_;
   static int service_ports_index_;
+
+  DISALLOW_COPY_AND_ASSIGN(File);
 };
 
 #endif  // BIN_FILE_H_