Fully rename argument

sdk/lib/io/process.dart

 // Copyright (c) 2013, 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.
 
 part of dart.io;
 
 // TODO(ager): The only reason for this class is that we
 // cannot patch a top-level at this point.
 class _ProcessUtils {
   external static void _exit(int status);
@@ skipping 23 matching lines @@
  * Besides this the Dart executable itself uses an exit code of `254`
  * for reporting compile time errors and an exit code of `255` for
  * reporting runtime error (unhandled exception).
  *
  * Due to these facts it is recommended to only use exit codes in the
  * range [0..127] for communicating the result of running a Dart
  * program to the surrounding environment. This will avoid any
  * cross-platform issues.
  */
 void exit(int code) {
-  if (status is !int) {
-    throw new ArgumentError("exit: int status expected");
+  if (code is !int) {
+    throw new ArgumentError("Integer value for exit code expected");
   }
-  _ProcessUtils._exit(status);
+  _ProcessUtils._exit(code);
 }
 
 /**
  * Global exit code for the Dart VM.
  *
  * The exit code is global for the Dart VM and the last assignment to
  * exitCode from any isolate determines the exit code of the Dart VM
  * on normal termination.
  *
  * See [exit] for more information on how to chose a value for the
  * exit code.
  */
 set exitCode(int code) {
-  if (status is !int) {
-    throw new ArgumentError("setExitCode: int status expected");
+  if (code is !int) {
+    throw new ArgumentError("Integer value for exit code expected");
   }
-  _ProcessUtils._setExitCode(status);
+  _ProcessUtils._setExitCode(code);
 }
 
 /**
  * Sleep for the duration specified in [duration].
  *
  * Use this with care, as no asynchronous operations can be processed
  * in a isolate while it is blocked in a [sleep] call.
  */
 void sleep(Duration duration) {
   int milliseconds = duration.inMilliseconds;
@@ skipping 293 matching lines @@
   /**
    * Contains the system message for the process exception if any.
    */
   final String message;
 
   /**
    * Contains the OS error code for the process exception if any.
    */
   final int errorCode;
 }