Stack allocate lexical locals + hoist stack slots

test/mjsunit/debug-scopes.js

 // Copyright 2011 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 1036 matching lines @@
 };
 catch_block_7();
 EndTest();
 
 
 BeginTest("Classes and methods 1");
 
 listener_delegate = function(exec_state) {
   "use strict"
   CheckScopeChain([debug.ScopeType.Local,
-                   debug.ScopeType.Block,
                    debug.ScopeType.Script,
                    debug.ScopeType.Global], exec_state);
-  CheckScopeContent({C1: class { m() { debugger; }} }, 1, exec_state);
+  CheckScopeContent({}, 1, exec_state);
 };
 
 (function() {
   "use strict";
   class C1 {
     m() {
       debugger;
     }
   }
   new C1().m();
 })();
 
 EndTest();
 
 
 assertEquals(begin_test_count, break_count,
              'one or more tests did not enter the debugger');
 assertEquals(begin_test_count, end_test_count,
              'one or more tests did not have its result checked');