Avoid using chunked transfer encoding when the HTTP verision is 1.0.

tests/standalone/io/http_content_length_test.dart

Index: tests/standalone/io/http_content_length_test.dart
diff --git a/tests/standalone/io/http_content_length_test.dart b/tests/standalone/io/http_content_length_test.dart
index cf2614588f647c6def0d187187f3c253d8ca7087..2baedb2b340cae5ea18f148af64719089e75b02b 100644
--- a/tests/standalone/io/http_content_length_test.dart
+++ b/tests/standalone/io/http_content_length_test.dart
@@ -79,7 +79,32 @@ void testBody(int totalConnections) {
   }
 }
 
+void testHttp10() {
+  HttpServer server = new HttpServer();
+  server.onError = (e) => Expect.fail("Unexpected error $e");
+  server.listen("127.0.0.1", 0, 5);
+  server.defaultRequestHandler = (HttpRequest request, HttpResponse response) {
+    OutputStream stream = response.outputStream;
+    Expect.equals("1.0", request.protocolVersion);
+    Expect.throws(() => stream.writeString("x"), (e) => e is HttpException);
+    response.contentLength = 0;
+    stream.close();
+  };
+
+  Socket socket = new Socket("127.0.0.1", server.port);
+  socket.onConnect = () {
+    List<int> buffer = new List<int>(1024);
+    socket.outputStream.writeString("GET / HTTP/1.0\r\n\r\n");
+    socket.onData = () => socket.readList(buffer, 0, buffer.length);
+    socket.onClosed = () {
+      socket.close(true);
+      server.close();
+    };
+  };
+}
+
 void main() {
   testNoBody(5);
   testBody(5);
+  testHttp10();
 }