[Tests] Fix some concurrent optimization tests on Ignition.

test/mjsunit/regress/regress-embedded-cons-string.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 18 matching lines @@
 // Flags: --expose-gc --allow-natives-syntax
 // Flags: --concurrent-recompilation --block-concurrent-recompilation
 
 if (!%IsConcurrentRecompilationSupported()) {
   print("Concurrent recompilation is disabled. Skipping this test.");
   quit();
 }
 
 function test(fun) {
   fun();
+  %BaselineFunctionOnNextCall(fun);
   fun();
   // Mark for concurrent optimization.
   %OptimizeFunctionOnNextCall(fun, "concurrent");
   // Kick off recompilation.
   fun();
   // Tenure cons string after compile graph has been created.
   gc();
   // In the mean time, concurrent recompiling is still blocked.
   assertUnoptimized(fun, "no sync");
   // Let concurrent recompilation proceed.
@@ skipping 12 matching lines @@
   return "abcdefghijklmn\u2603" + "123456789";
 }
 
 function h() {
   return "abcdefghijklmn\u2603" + "123456789\u2604";
 }
 
 test(f);
 test(g);
 test(h);