Enable WebSocket compression for the service protocol

runtime/bin/vmservice/server.dart

Index: runtime/bin/vmservice/server.dart
diff --git a/runtime/bin/vmservice/server.dart b/runtime/bin/vmservice/server.dart
index 8204cb9d0cae221e290c7f72e6ba8144710510ed..4e4c54ae2b9e4714f41b31964376179bd3147501 100644
--- a/runtime/bin/vmservice/server.dart
+++ b/runtime/bin/vmservice/server.dart
@@ -173,8 +173,7 @@ class Server {
           request.uri.path == '/' ? ROOT_REDIRECT_PATH : request.uri.path;
 
     if (path == WEBSOCKET_PATH) {
-      WebSocketTransformer.upgrade(request,
-                                   compression: CompressionOptions.OFF).then(
+      WebSocketTransformer.upgrade(request).then(
                                    (WebSocket webSocket) {
         new WebSocketClient(webSocket, _service);
       });