Reapply "Update the test runner to use the new dart:io API"

tests/standalone/standalone.status

Index: tests/standalone/standalone.status
diff --git a/tests/standalone/standalone.status b/tests/standalone/standalone.status
index 15e6e36305ca83c517c71944e426403e85818246..1bdaa2b8525a6b357cc07f1882c07bec4605c781 100644
--- a/tests/standalone/standalone.status
+++ b/tests/standalone/standalone.status
@@ -4,17 +4,8 @@
 
 package/invalid_uri_test: Fail, OK # Fails intentionally
 
-[ $runtime == vm ]
-# Temporarily disabled until the test scripts are rewritten for
-# dart:io v2.
-io/skipping_dart2js_compilations_test: skip # Non-fatal process error.
-io/status_file_parser_test: fail
-io/test_runner_exit_code_test: fail
-io/test_runner_test: fail
-
 [ $compiler == dartc ]
 io/skipping_dart2js_compilations_test: Fail  # Date-to-DateTime renaming. Also fails on VM above.
-io/test_runner_test: Fail  # Date-to-DateTime renaming. Also fails on vm above.
 
 
 [ $runtime == vm && ( $system == windows ) ]