Land https://codereview.chromium.org/2662393002 for Jason.

runtime/bin/embedded_dart_io.h

 // Copyright (c) 2015, 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 RUNTIME_BIN_EMBEDDED_DART_IO_H_
 #define RUNTIME_BIN_EMBEDDED_DART_IO_H_
 
 namespace dart {
 namespace bin {
 
 // Bootstraps 'dart:io'.
 void BootstrapDartIo();
 
 // Lets dart:io know where the system temporary directory is located.
 // Currently only wired up on Android.
 void SetSystemTempDirectory(const char* system_temp);
 
 // Tells the system whether to capture Stdout events.
 void SetCaptureStdout(bool value);
 
 // Tells the system whether to capture Stderr events.
 void SetCaptureStderr(bool value);
 
 // Should Stdout events be captured?
 bool ShouldCaptureStdout();
 
 // Should Stderr events be captured?
 bool ShouldCaptureStderr();
 
+// Set the executable name used by Platform.executable.
+void SetExecutableName(const char* executable_name);
+
+// Set the arguments used by Platform.executableArguments.
+void SetExecutableArguments(int script_index, char** argv);
+
 }  // namespace bin
 }  // namespace dart
 
 #endif  // RUNTIME_BIN_EMBEDDED_DART_IO_H_