[parser] Restore RETURN_IF_PARSE_ERROR in for/await

Bug: chromium:900085, v8:8363, v8:7926
Change-Id: I033bd4d95cdd85eee635279357c3c5d3fbe912c8
Reviewed-on: https://chromium-review.googlesource.com/c/1306438Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57116}

src/parsing/parser-base.h

@@ -5896,6 +5896,7 @@ typename ParserBase<Impl>::StatementT ParserBase<Impl>::ParseForAwaitStatement(
       BlockT body_block = impl()->NullStatement();
       impl()->DesugarBindingInForEachStatement(&for_info, &body_block,
                                                &each_variable);
+      RETURN_IF_PARSE_ERROR;
       body_block->statements()->Add(body, zone());
       body_block->set_scope(scope()->FinalizeBlockScope());
       body = body_block;

test/mjsunit/regress/regress-900085.js

+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+assertThrows(
+    "async function f() { let v = 1; for await (var v of {}) { }",
+    SyntaxError);