She'll continue on under any circumstance IMO, after all, in her mind she "Deserves it." Her entire life has been built upon this and it is slipping from her grasp. Like the cold hearted witch she is, she won't give it up easily.
However, continuing on would be futile unless she manages to put up HUGE margins in BOTH Ohio and Texas. There isn't going to be enough to save her, especially when you factor in that Obama is likely to win several more states smaller States and North Carolina which has quite a few delegates.
The win in North Carolina alone (Which will likely be rather large) would erase any big gains Hillary! might make in Pennsylvania.
As I said, a 1% win in Texas and a 7% win in Ohio isn't nearly enough for her.
She still might try to steal the nomination though.
After all, she believes she "Deserves it."