Support GZip encoding on the http server.

tests/standalone/io/http_10_test.dart

 // (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // VMOptions=
 // VMOptions=--short_socket_read
 // VMOptions=--short_socket_write
 // VMOptions=--short_socket_read --short_socket_write
 
 import "dart:isolate";
@@ skipping 81 matching lines @@
               String s = new String.fromCharCodes(response).toLowerCase();
               print(s);
               Expect.equals("z", s[s.length - 1]);
               Expect.equals(-1, s.indexOf("content-length:"));
               Expect.equals(-1, s.indexOf("keep-alive"));
               if (count < 10) {
                 makeRequest();
               } else {
                 server.close();
               }
-                      },onError: (e) => print(e));
+            },
+            onError: (e) => print(e));
       });
     }
     makeRequest();
   });
 }
 
 
 // Client makes a HTTP 1.0 request with connection keep alive. The
 // server sets a content length so the persistent connection can be
 // used.
@@ skipping 90 matching lines @@
 }
 
 
 void main() {
   testHttp10NoKeepAlive();
   // TODO(8871): This test fails with short socket writes.
   //testHttp10ServerClose();
   testHttp10KeepAlive();
   testHttp10KeepAliveServerCloses();
 }