Clean up dart:io exceptions.

tests/standalone/io/raw_secure_server_socket_test.dart

Index: tests/standalone/io/raw_secure_server_socket_test.dart
diff --git a/tests/standalone/io/raw_secure_server_socket_test.dart b/tests/standalone/io/raw_secure_server_socket_test.dart
index 0b91750d5ab8b09c6c0ed4dc3de35321f3829113..a886f7d990f15ae2617638a7b386614e969f7fe8 100644
--- a/tests/standalone/io/raw_secure_server_socket_test.dart
+++ b/tests/standalone/io/raw_secure_server_socket_test.dart
@@ -33,7 +33,7 @@ void testInvalidBind() {
   RawSecureServerSocket.bind("ko.faar.__hest__", 0, CERTIFICATE).then((_) {
     Expect.fail("Failure expected");
   }).catchError((error) {
-    Expect.isTrue(error is SocketIOException);
+    Expect.isTrue(error is SocketException);
     port.toSendPort().send(1);
   });
 
@@ -41,7 +41,7 @@ void testInvalidBind() {
   RawSecureServerSocket.bind("8.8.8.8", 0, CERTIFICATE).then((_) {
     Expect.fail("Failure expected");
   }).catchError((error) {
-    Expect.isTrue(error is SocketIOException);
+    Expect.isTrue(error is SocketException);
     port.toSendPort().send(1);
   });
 
@@ -61,7 +61,7 @@ void testInvalidBind() {
     })
     .catchError((error) {
       Expect.notEquals('windows', Platform.operatingSystem);
-      Expect.isTrue(error is SocketIOException);
+      Expect.isTrue(error is SocketException);
       s.close();
       port.toSendPort().send(1);
     });
@@ -91,13 +91,13 @@ void testSimpleConnectFail(String certificate, bool cancelOnError) {
         Expect.fail("No client connection expected.");
       })
       .catchError((error) {
-        Expect.isTrue(error is SocketIOException);
+        Expect.isTrue(error is SocketException);
       });
     server.listen((serverEnd) {
       Expect.fail("No server connection expected.");
     },
     onError: (error) {
-      Expect.isTrue(error is SocketIOException);
+      Expect.isTrue(error is SocketException);
       clientEndFuture.then((_) {
         if (!cancelOnError) server.close();
         port.close();