Consolidate calls to Dependency_info in recheck_merge
Consolidate calls to Dependency_info in recheck_merge

Summary: This probably leads to a slight improvement in recheck times. Most likely not enough to measure, but might as well grab it. It's also just simpler to compute things once and not repeatedly.

Reviewed By: gabelevi

Differential Revision: D16966799

fbshipit-source-id: 26c5643d6ca0e97ffe546917a2bbdd775053fe90

mroch/flow,gabelevi/flow,gabelevi/flow,gabelevi/flow,mroch/flow,samwgoldman/flow,samwgoldman/flow,mroch/flow,gabelevi/flow,samwgoldman/flow,gabelevi/flow,samwgoldman/flow,facebook/flow,gabelevi/flow,facebook/flow,mroch/flow,samwgoldman/flow,facebook/flow,facebook/flow,facebook/flow,samwgoldman/flow,facebook/flow,mroch/flow,samwgoldman/flow,gabelevi/flow,mroch/flow,facebook/flow,mroch/flow