Clean up dart:io exceptions.

tests/standalone/io/http_redirect_test.dart

Index: tests/standalone/io/http_redirect_test.dart
diff --git a/tests/standalone/io/http_redirect_test.dart b/tests/standalone/io/http_redirect_test.dart
index f67ff751d5bbe738e795783732de40a4f28138bf..d0b78a0f31de5cb543f9ee397d8754bd409fe476 100644
--- a/tests/standalone/io/http_redirect_test.dart
+++ b/tests/standalone/io/http_redirect_test.dart
@@ -391,7 +391,7 @@ void testAutoRedirectLimit() {
         Expect.equals(5, error.redirects.length);
         server.close();
         client.close();
-      }, test: (e) => e is RedirectLimitExceededException);
+      }, test: (e) => e is RedirectException);
   });
 }
 
@@ -406,7 +406,7 @@ void testRedirectLoop() {
         Expect.equals(2, error.redirects.length);
         server.close();
         client.close();
-      }, test: (e) => e is RedirectLoopException);
+      }, test: (e) => e is RedirectException);
   });
 }