Slight cleanup of TryCatch parsing/variable declaration

test/mjsunit/harmony/async-function-stacktrace.js

 // Copyright 2016 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.
 
 // Flags: --harmony-async-await
 
 async function test(func, funcs) {
   try {
     await func();
     throw new Error("Expected " + func.toString() + " to throw");
@@ skipping 79 matching lines @@
 
   await test(async() => { await 1; throw new Error("FAIL") }, ["async"]);
 
   await test(async() => {
     await 1;
     try {
       await thrower();
     } catch (e) {
       throw new Error("FAIL");
     }
-  }, ["e"]); // TODO(caitp): FuncNameInferer is doing some weird stuff...
+  }, ["async"]);
 
   await test(async() => {
     await 1;
     try {
       await reject();
     } catch (e) {
       throw new Error("FAIL");
     }
-  }, ["e"]);
+  }, ["async"]);
 }
 
 runTests().catch(e => {
   print(e);
   quit(1);
 });