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

test/mjsunit/regress/regress-99167.js

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-// Flags: --expose-gc --max-new-space-size=2
+// Flags: --expose-gc  --max_semispace_size=1

[Michael Starzinger, 2014/05/08 13:22:02]

nit: Only one white-space between flags.

[Hannes Payer (out of office), 2014/05/08 13:53:44]

Done.

 
 eval("function Node() { this.a = 1; this.a = 3; }");
 new Node;
 for (var i = 0; i < 4; ++i) gc();
 for (var i = 0; i < 100000; ++i) new Node;