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

runtime/bin/file_macos.cc

 // 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.
 
 #include "bin/file.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <unistd.h>
 #include <libgen.h>
 #include <limits.h>
 
 #include "bin/builtin.h"
 
 class FileHandle {
  public:
   explicit FileHandle(int fd) : fd_(fd) { }
   ~FileHandle() { }
   int fd() const { return fd_; }
   void set_fd(int fd) { fd_ = fd; }
 
  private:
   int fd_;
 
-  // DISALLOW_COPY_AND_ASSIGN(FileHandle).
-  FileHandle(const FileHandle&);
-  void operator=(const FileHandle&);
+  DISALLOW_COPY_AND_ASSIGN(FileHandle);
 };
 
 
 File::~File() {
   // Close the file (unless it's a standard stream).
   if (handle_->fd() > STDERR_FILENO) {
     Close();
   }
   delete handle_;
 }
@@ skipping 203 matching lines @@
   int result = fstat(fd, &buf);
   if (result == -1) {
     FATAL2("Failed stat on file descriptor %d: %s", fd, strerror(errno));
   }
   if (S_ISCHR(buf.st_mode)) return kTerminal;
   if (S_ISFIFO(buf.st_mode)) return kPipe;
   if (S_ISSOCK(buf.st_mode)) return kSocket;
   if (S_ISREG(buf.st_mode)) return kFile;
   return kOther;
 }