void HGraphBuilder::VisitForControl(Expression* expr,
                                    HBasicBlock* true_block,
                                    HBasicBlock* false_block) {
  TestContext for_test(this, expr, oracle(), true_block, false_block);
  Visit(expr);
}
void HGraphBuilder::VisitForControl(Expression* expr,
                                    HBasicBlock* true_block,
                                    HBasicBlock* false_block) {
  TestContext for_test(this, expr, oracle(), true_block, false_block);
  Visit(expr);
}