Experimental parser: utf8 added to build

src/lexer/lexer-shell.cc

Index: src/lexer/lexer-shell.cc
diff --git a/src/lexer/lexer-shell.cc b/src/lexer/lexer-shell.cc
index 8bb4a9659951d5ef91d15a927b97e00414cbfe17..6c72590e2745dfd728bb1b6ad4beba74192d0527 100644
--- a/src/lexer/lexer-shell.cc
+++ b/src/lexer/lexer-shell.cc
@@ -281,6 +281,11 @@ std::pair<TimeDelta, TimeDelta> ProcessFile(
   }
   if (run_experimental) {
     switch (encoding) {
+      case UTF8:
+        experimental_time = RunExperimentalScanner<int8_t>(
+            fname, isolate, encoding, print_tokens || check_tokens,
+            &experimental_tokens, repeat, harmony_settings);
+        break;
       case LATIN1:
         experimental_time = RunExperimentalScanner<uint8_t>(
             fname, isolate, encoding, print_tokens || check_tokens,