Add Platform.packageRoot and Platform.executableArguments to dart:io.

runtime/bin/platform.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 BIN_PLATFORM_H_
 #define BIN_PLATFORM_H_
 
 #include "bin/builtin.h"
 
 
@@ skipping 24 matching lines @@
   static void FreeEnvironment(char** env, intptr_t count);
 
   // Stores and gets the executable name.
   static void SetExecutableName(const char* executable_name) {
     executable_name_ = executable_name;
   }
   static const char* GetExecutableName() {
     return executable_name_;
   }
 
+  // Stores and gets the package root.
+  static void SetPackageRoot(const char* package_root) {
+    package_root_ = package_root;
+  }
+  static const char* GetPackageRoot() {
+    return package_root_;
+  }
+
+  // Stores and gets the flags passed to the executable.
+  static void SetExecutableArguments(int script_index, char** argv) {
+    script_index_ = script_index;
+    argv_ = argv;
+  }
+  static int GetScriptIndex() {
+    return script_index_;
+  }
+  static char** GetArgv() {
+    return argv_;
+  }
+
  private:
   static const char* executable_name_;
+  static const char* package_root_;
+  static int script_index_;
+  static char** argv_;  // VM flags are argv_[1 ... script_index_ - 1]
 
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(Platform);
 };
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // BIN_PLATFORM_H_