Add requestTime to responses

pkg/analyzer_plugin/lib/src/protocol/protocol_internal.dart

Index: pkg/analyzer_plugin/lib/src/protocol/protocol_internal.dart
diff --git a/pkg/analyzer_plugin/lib/src/protocol/protocol_internal.dart b/pkg/analyzer_plugin/lib/src/protocol/protocol_internal.dart
index 75d093c6601c21ba1f962f3c1cdf9df76514ca3b..6c03ebbb1af6767dc3125ea63e5bc49abdc24b20 100644
--- a/pkg/analyzer_plugin/lib/src/protocol/protocol_internal.dart
+++ b/pkg/analyzer_plugin/lib/src/protocol/protocol_internal.dart
@@ -517,7 +517,7 @@ class ResponseDecoder extends JsonDecoder {
 abstract class ResponseResult implements HasToJson {
   /**
    * Return a response whose result data is this object for the request with the
-   * given [id].
+   * given [id], where the request was received at the given [requestTime].
    */
-  Response toResponse(String id);
+  Response toResponse(String id, int requestTime);
 }