[parser] Do not call ResetAfterPreparsing twice.

AnalyzePartially already calls ResetAfterPreparsing.

BUG=v8:6093

Change-Id: Idafed85133016a6c7ba17074e269ff2ab94ff38d
Reviewed-on: https://chromium-review.googlesource.com/493387Reviewed-by: Marja Hölttä <marja@chromium.org>
Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Commit-Queue: Wiktor Garbacz <wiktorg@google.com>
Cr-Commit-Position: refs/heads/master@{#45050}

src/parsing/parser.cc

@@ -2757,9 +2757,7 @@ FunctionLiteral* Parser::ParseFunctionLiteral(
                  scope->start_position(),
                  should_use_parse_task ? "SUCCESS" : "FAILED");
         }
-        if (should_use_parse_task) {
-          scope->ResetAfterPreparsing(ast_value_factory(), false);
-        } else {
+        if (!should_use_parse_task) {
           // Fallback to eager parsing below if we failed to enqueue parse tasks
           bookmark.Apply();
           scope->ResetAfterPreparsing(ast_value_factory(), true);