Simplify ConfigureHeap and change --max_new_space_size to --max_semi_space_size.

test/mjsunit/regress/regress-create-exception.js

 // Copyright 2010 the V8 project authors. All rights reserved.
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 // 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.
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-// Flags: --max-new-space-size=2
+// Flags: --max_semi_space_size=1
 "use strict";
 
 // Check for GC bug constructing exceptions.
 var v = [1, 2, 3, 4]
 
 Object.preventExtensions(v);
 
 function foo() {
   var re = /2147483647/;  // Equal to 0x7fffffff.
   for  (var i = 0; i < 10000; i++) {
@@ skipping 11 matching lines @@
       return j;  // Make sure that future optimizations don't eliminate j.
     } catch(e) {
       ok = true;
       assertTrue(re.test(e), 'e: ' + e);
     }
     assertTrue(ok);
   }
 }
 
 foo();