Properly init collectDone_
Properly init collectDone_

Summary: facepaw

Reviewed By: djwatson

Differential Revision: D2709030

fb-gh-sync-id: 20fe50bc70e97c4fedeae8fd271a4de70fa0e805

Orvid/folly,floxard/folly,Hincoin/folly,rklabs/folly,juniway/folly,juniway/folly,brunomorishita/folly,brunomorishita/folly,Orvid/folly,floxard/folly,brunomorishita/folly,alexst07/folly,floxard/folly,charsyam/folly,facebook/folly,Hincoin/folly,alexst07/folly,Orvid/folly,juniway/folly,charsyam/folly,facebook/folly,Hincoin/folly,floxard/folly,alexst07/folly,Orvid/folly,brunomorishita/folly,Hincoin/folly,rklabs/folly,alexst07/folly,sonnyhu/folly,rklabs/folly,mqeizi/folly,Orvid/folly,rklabs/folly,charsyam/folly,facebook/folly,mqeizi/folly,rklabs/folly,facebook/folly,floxard/folly,facebook/folly,Hincoin/folly,sonnyhu/folly,sonnyhu/folly,sonnyhu/folly,sonnyhu/folly,mqeizi/folly,brunomorishita/folly,juniway/folly,charsyam/folly,mqeizi/folly,mqeizi/folly,alexst07/folly,juniway/folly