Fully rename argument

sdk/lib/io/process.dart

Index: sdk/lib/io/process.dart
diff --git a/sdk/lib/io/process.dart b/sdk/lib/io/process.dart
index dd7f0dcdaa5f8b24db4db393035ffe47378d1257..3c0f0fe392a3b74891afa4d2b6eb4fe680c3548e 100644
--- a/sdk/lib/io/process.dart
+++ b/sdk/lib/io/process.dart
@@ -41,10 +41,10 @@ class _ProcessUtils {
  * 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);
 }
 
 /**
@@ -58,10 +58,10 @@ void exit(int code) {
  * 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);
 }
 
 /**