Use PriorityNode.compute_results_to_parent in init_expr_trans
Use PriorityNode.compute_results_to_parent in init_expr_trans

Summary:
public
Simplify init_expr_trans

Reviewed By: dulmarod

Differential Revision: D2734937

fb-gh-sync-id: 1818bda

kstreee/infer,xennygrimmato/infer,xennygrimmato/infer,kstreee/infer,kageiit/infer,ryoon/infer,xennygrimmato/infer,ryoon/infer,facebook/infer,jvillard/infer,kageiit/infer,jsachs/infer,jsachs/infer,kageiit/infer,jsachs/infer,ropas/infer,xennygrimmato/infer,ropas/infer,blzq/infer,ryoon/infer,jvillard/infer,jvillard/infer,blzq/infer,jvillard/infer,kstreee/infer,jsachs/infer,blzq/infer,kageiit/infer,kstreee/infer,kstreee/infer,xennygrimmato/infer,ryoon/infer,ropas/infer,blzq/infer,blzq/infer,kstreee/infer,xennygrimmato/infer,jsachs/infer,kageiit/infer,facebook/infer,facebook/infer,ropas/infer,ropas/infer,facebook/infer,blzq/infer,jsachs/infer,kageiit/infer,ryoon/infer,kageiit/infer,facebook/infer,ropas/infer,jvillard/infer,jvillard/infer,facebook/infer,xennygrimmato/infer,ryoon/infer,facebook/infer,jvillard/infer