Combine two FindObsoleteFiles()
Combine two FindObsoleteFiles()

Summary: We don't need to call FindObsoleteFiles() twice

Test Plan: deletefile_test

Reviewers: dhruba

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D14007

hobinyoon/rocksdb,anagav/rocksdb,geraldoandradee/rocksdb,wenduo/rocksdb,JohnPJenkins/rocksdb,mbarbon/rocksdb,mbarbon/rocksdb,biddyweb/rocksdb,geraldoandradee/rocksdb,lgscofield/rocksdb,anagav/rocksdb,JohnPJenkins/rocksdb,SunguckLee/RocksDB,dkorolev/rocksdb,Vaisman/rocksdb,geraldoandradee/rocksdb,wat-ze-hex/rocksdb,kaschaeffer/rocksdb,wat-ze-hex/rocksdb,Andymic/rocksdb,JoeWoo/rocksdb,flabby/rocksdb,flabby/rocksdb,wenduo/rocksdb,facebook/rocksdb,lgscofield/rocksdb,msb-at-yahoo/rocksdb,anagav/rocksdb,SunguckLee/RocksDB,amyvmiwei/rocksdb,hobinyoon/rocksdb,JoeWoo/rocksdb,wat-ze-hex/rocksdb,hobinyoon/rocksdb,dkorolev/rocksdb,amyvmiwei/rocksdb,siddhartharay007/rocksdb,jalexanderqed/rocksdb,tsheasha/rocksdb,tsheasha/rocksdb,sorphi/rocksdb,IMCG/RcoksDB,facebook/rocksdb,anagav/rocksdb,tschottdorf/rocksdb,IMCG/RcoksDB,luckywhu/rocksdb,luckywhu/rocksdb,flabby/rocksdb,skunkwerks/rocksdb,caijieming-baidu/rocksdb,kaschaeffer/rocksdb,JoeWoo/rocksdb,RyanTech/rocksdb,biddyweb/rocksdb,vashstorm/rocksdb,Applied-Duality/rocksdb,temicai/rocksdb,zhangpng/rocksdb,sorphi/rocksdb,bbiao/rocksdb,IMCG/RcoksDB,wat-ze-hex/rocksdb,hobinyoon/rocksdb,caijieming-baidu/rocksdb,jalexanderqed/rocksdb,caijieming-baidu/rocksdb,sorphi/rocksdb,NickCis/rocksdb,Vaisman/rocksdb,makelivedotnet/rocksdb,ryneli/rocksdb,JohnPJenkins/rocksdb,wlqGit/rocksdb,sorphi/rocksdb,wenduo/rocksdb,alihalabyah/rocksdb,ryneli/rocksdb,makelivedotnet/rocksdb,wskplho/rocksdb,tizzybec/rocksdb,tizzybec/rocksdb,fengshao0907/rocksdb,siddhartharay007/rocksdb,skunkwerks/rocksdb,OverlordQ/rocksdb,ylong/rocksdb,IMCG/RcoksDB,fengshao0907/rocksdb,sorphi/rocksdb,caijieming-baidu/rocksdb,dkorolev/rocksdb,RyanTech/rocksdb,vashstorm/rocksdb,mbarbon/rocksdb,RyanTech/rocksdb,ylong/rocksdb,wenduo/rocksdb,rDSN-Projects/rocksdb.replicated,vmx/rocksdb,alihalabyah/rocksdb,skunkwerks/rocksdb,amyvmiwei/rocksdb,ylong/rocksdb,dkorolev/rocksdb,amyvmiwei/rocksdb,wskplho/rocksdb,Vaisman/rocksdb,kaschaeffer/rocksdb,bbiao/rocksdb,fengshao0907/rocksdb,ylong/rocksdb,luckywhu/rocksdb,biddyweb/rocksdb,JackLian/rocksdb,zhangpng/rocksdb,lgscofield/rocksdb,mbarbon/rocksdb,norton/rocksdb,ryneli/rocksdb,mbarbon/rocksdb,rDSN-Projects/rocksdb.replicated,IMCG/RcoksDB,vmx/rocksdb,vmx/rocksdb,makelivedotnet/rocksdb,makelivedotnet/rocksdb,facebook/rocksdb,NickCis/rocksdb,rDSN-Projects/rocksdb.replicated,tsheasha/rocksdb,flabby/rocksdb,wat-ze-hex/rocksdb,makelivedotnet/rocksdb,sorphi/rocksdb,Vaisman/rocksdb,facebook/rocksdb,msb-at-yahoo/rocksdb,norton/rocksdb,caijieming-baidu/rocksdb,lgscofield/rocksdb,vashstorm/rocksdb,msb-at-yahoo/rocksdb,tsheasha/rocksdb,OverlordQ/rocksdb,fengshao0907/rocksdb,dkorolev/rocksdb,wskplho/rocksdb,NickCis/rocksdb,skunkwerks/rocksdb,siddhartharay007/rocksdb,msb-at-yahoo/rocksdb,wskplho/rocksdb,Vaisman/rocksdb,biddyweb/rocksdb,zhangpng/rocksdb,anagav/rocksdb,wlqGit/rocksdb,alihalabyah/rocksdb,hobinyoon/rocksdb,OverlordQ/rocksdb,norton/rocksdb,virtdb/rocksdb,amyvmiwei/rocksdb,rDSN-Projects/rocksdb.replicated,zhangpng/rocksdb,JoeWoo/rocksdb,tschottdorf/rocksdb,luckywhu/rocksdb,kaschaeffer/rocksdb,OverlordQ/rocksdb,vashstorm/rocksdb,virtdb/rocksdb,SunguckLee/RocksDB,JohnPJenkins/rocksdb,NickCis/rocksdb,geraldoandradee/rocksdb,bbiao/rocksdb,tizzybec/rocksdb,fengshao0907/rocksdb,skunkwerks/rocksdb,IMCG/RcoksDB,jalexanderqed/rocksdb,tsheasha/rocksdb,virtdb/rocksdb,temicai/rocksdb,tschottdorf/rocksdb,virtdb/rocksdb,wenduo/rocksdb,luckywhu/rocksdb,jalexanderqed/rocksdb,SunguckLee/RocksDB,Applied-Duality/rocksdb,JoeWoo/rocksdb,Applied-Duality/rocksdb,SunguckLee/RocksDB,bbiao/rocksdb,siddhartharay007/rocksdb,hobinyoon/rocksdb,makelivedotnet/rocksdb,lgscofield/rocksdb,facebook/rocksdb,SunguckLee/RocksDB,tsheasha/rocksdb,ryneli/rocksdb,JohnPJenkins/rocksdb,luckywhu/rocksdb,ryneli/rocksdb,vashstorm/rocksdb,fengshao0907/rocksdb,vmx/rocksdb,tizzybec/rocksdb,Vaisman/rocksdb,jalexanderqed/rocksdb,wlqGit/rocksdb,SunguckLee/RocksDB,vashstorm/rocksdb,RyanTech/rocksdb,wenduo/rocksdb,biddyweb/rocksdb,hobinyoon/rocksdb,temicai/rocksdb,temicai/rocksdb,Applied-Duality/rocksdb,wenduo/rocksdb,siddhartharay007/rocksdb,lgscofield/rocksdb,flabby/rocksdb,norton/rocksdb,skunkwerks/rocksdb,biddyweb/rocksdb,sorphi/rocksdb,vmx/rocksdb,flabby/rocksdb,vmx/rocksdb,wskplho/rocksdb,alihalabyah/rocksdb,RyanTech/rocksdb,tizzybec/rocksdb,caijieming-baidu/rocksdb,amyvmiwei/rocksdb,alihalabyah/rocksdb,NickCis/rocksdb,tschottdorf/rocksdb,msb-at-yahoo/rocksdb,tsheasha/rocksdb,wlqGit/rocksdb,wenduo/rocksdb,norton/rocksdb,biddyweb/rocksdb,virtdb/rocksdb,skunkwerks/rocksdb,norton/rocksdb,JackLian/rocksdb,mbarbon/rocksdb,tizzybec/rocksdb,NickCis/rocksdb,geraldoandradee/rocksdb,tschottdorf/rocksdb,anagav/rocksdb,bbiao/rocksdb,norton/rocksdb,facebook/rocksdb,alihalabyah/rocksdb,temicai/rocksdb,wlqGit/rocksdb,siddhartharay007/rocksdb,facebook/rocksdb,anagav/rocksdb,Andymic/rocksdb,facebook/rocksdb,kaschaeffer/rocksdb,OverlordQ/rocksdb,ryneli/rocksdb,zhangpng/rocksdb,Andymic/rocksdb,temicai/rocksdb,NickCis/rocksdb,Applied-Duality/rocksdb,Applied-Duality/rocksdb,wat-ze-hex/rocksdb,geraldoandradee/rocksdb,tsheasha/rocksdb,mbarbon/rocksdb,RyanTech/rocksdb,ylong/rocksdb,ylong/rocksdb,geraldoandradee/rocksdb,amyvmiwei/rocksdb,IMCG/RcoksDB,alihalabyah/rocksdb,jalexanderqed/rocksdb,JohnPJenkins/rocksdb,virtdb/rocksdb,virtdb/rocksdb,tschottdorf/rocksdb,Andymic/rocksdb,dkorolev/rocksdb,caijieming-baidu/rocksdb,bbiao/rocksdb,JoeWoo/rocksdb,norton/rocksdb,OverlordQ/rocksdb,wskplho/rocksdb,flabby/rocksdb,siddhartharay007/rocksdb,wat-ze-hex/rocksdb,RyanTech/rocksdb,luckywhu/rocksdb,JackLian/rocksdb,rDSN-Projects/rocksdb.replicated,jalexanderqed/rocksdb,JackLian/rocksdb,JackLian/rocksdb,dkorolev/rocksdb,wlqGit/rocksdb,kaschaeffer/rocksdb,JohnPJenkins/rocksdb,Andymic/rocksdb,vmx/rocksdb,zhangpng/rocksdb,JackLian/rocksdb,kaschaeffer/rocksdb,SunguckLee/RocksDB,rDSN-Projects/rocksdb.replicated,hobinyoon/rocksdb,ryneli/rocksdb,wskplho/rocksdb,zhangpng/rocksdb,temicai/rocksdb,OverlordQ/rocksdb,bbiao/rocksdb,JoeWoo/rocksdb,wat-ze-hex/rocksdb,ylong/rocksdb,lgscofield/rocksdb,wlqGit/rocksdb,Andymic/rocksdb,bbiao/rocksdb,rDSN-Projects/rocksdb.replicated,JackLian/rocksdb,Vaisman/rocksdb,Andymic/rocksdb,vashstorm/rocksdb,makelivedotnet/rocksdb,Andymic/rocksdb,vmx/rocksdb,msb-at-yahoo/rocksdb,fengshao0907/rocksdb,Applied-Duality/rocksdb,tizzybec/rocksdb