Remove public SocketInputStream and SocketOutputStream clases

tools/ddbg.dart

Index: tools/ddbg.dart
diff --git a/tools/ddbg.dart b/tools/ddbg.dart
index eaf0258a85f979918ea8fe8cd6595f4997207707..4a716205f83242a8c7c22b4e3e31c3190eede43b 100644
--- a/tools/ddbg.dart
+++ b/tools/ddbg.dart
@@ -529,12 +529,12 @@ int jsonObjectLength(String string) {
 void main() {
   outstandingCommands = new Map<int, Completer>();
   vmSock = new Socket("127.0.0.1", 5858);
-  vmStream = new SocketOutputStream(vmSock);
+  vmStream = vmSock.outputStream;
   var stdinStream = new StringInputStream(stdin);
   stdinStream.onLine = () {
     processCommand(stdinStream.readLine());
   };
-  var vmInStream = new SocketInputStream(vmSock);
+  var vmInStream = vmSock.inputStream;
   vmInStream.onData = () {
     String s = decodeUtf8(vmInStream.read());
     processVmData(s);