[sync] Fix pin_sim.cc.
[sync] Fix pin_sim.cc.

victorisildur/Graphite,8l/Graphite,nkawahara/Graphite,fhijaz/Graphite,victorisildur/Graphite,mit-carbon/Graphite,8l/Graphite,victorisildur/Graphite,8l/Graphite,mit-carbon/Graphite-Cycle-Level,mit-carbon/Graphite,nkawahara/Graphite,8l/Graphite,fhijaz/Graphite,mit-carbon/Graphite,mit-carbon/Graphite-Cycle-Level,fhijaz/Graphite,mit-carbon/Graphite-Cycle-Level,nkawahara/Graphite,nkawahara/Graphite,mit-carbon/Graphite,fhijaz/Graphite,victorisildur/Graphite,mit-carbon/Graphite-Cycle-Level