Revert "[loop-arc] Make some methods on LoopRegion const."
Revert "[loop-arc] Make some methods on LoopRegion const."

This reverts commit r32735.

I am going to look into this later on the bus.

Swift SVN r32736

khizkhiz/swift,emilstahl/swift,devincoughlin/swift,MukeshKumarS/Swift,adrfer/swift,manavgabhawala/swift,khizkhiz/swift,nathawes/swift,JaSpa/swift,glessard/swift,LeoShimonaka/swift,amraboelela/swift,karwa/swift,shajrawi/swift,Ivacker/swift,kentya6/swift,kstaring/swift,CodaFi/swift,kusl/swift,codestergit/swift,emilstahl/swift,jtbandes/swift,jopamer/swift,ben-ng/swift,calebd/swift,rudkx/swift,jckarter/swift,tinysun212/swift-windows,kstaring/swift,djwbrown/swift,bitjammer/swift,hughbe/swift,atrick/swift,rudkx/swift,Jnosh/swift,emilstahl/swift,Jnosh/swift,deyton/swift,shahmishal/swift,jckarter/swift,ahoppen/swift,gregomni/swift,mightydeveloper/swift,zisko/swift,SwiftAndroid/swift,return/swift,djwbrown/swift,practicalswift/swift,gribozavr/swift,harlanhaskins/swift,uasys/swift,slavapestov/swift,kperryua/swift,sdulal/swift,SwiftAndroid/swift,tkremenek/swift,OscarSwanros/swift,austinzheng/swift,swiftix/swift.old,JaSpa/swift,JGiola/swift,CodaFi/swift,xedin/swift,russbishop/swift,ken0nek/swift,manavgabhawala/swift,milseman/swift,therealbnut/swift,kperryua/swift,lorentey/swift,jmgc/swift,jtbandes/swift,natecook1000/swift,felix91gr/swift,dduan/swift,kentya6/swift,shahmishal/swift,airspeedswift/swift,swiftix/swift.old,IngmarStein/swift,danielmartin/swift,apple/swift,OscarSwanros/swift,SwiftAndroid/swift,russbishop/swift,hughbe/swift,swiftix/swift.old,tkremenek/swift,johnno1962d/swift,danielmartin/swift,gregomni/swift,allevato/swift,bitjammer/swift,kusl/swift,kentya6/swift,LeoShimonaka/swift,modocache/swift,karwa/swift,therealbnut/swift,swiftix/swift.old,karwa/swift,MukeshKumarS/Swift,KrishMunot/swift,cbrentharris/swift,gribozavr/swift,MukeshKumarS/Swift,manavgabhawala/swift,mightydeveloper/swift,return/swift,xedin/swift,ben-ng/swift,xwu/swift,jtbandes/swift,jckarter/swift,xedin/swift,xedin/swift,natecook1000/swift,modocache/swift,jopamer/swift,sschiau/swift,cbrentharris/swift,modocache/swift,aschwaighofer/swift,benlangmuir/swift,johnno1962d/swift,swiftix/swift,allevato/swift,amraboelela/swift,SwiftAndroid/swift,xwu/swift,dreamsxin/swift,JGiola/swift,shajrawi/swift,felix91gr/swift,therealbnut/swift,aschwaighofer/swift,deyton/swift,adrfer/swift,sdulal/swift,gmilos/swift,hooman/swift,calebd/swift,parkera/swift,huonw/swift,arvedviehweger/swift,parkera/swift,Ivacker/swift,kperryua/swift,jmgc/swift,tjw/swift,deyton/swift,arvedviehweger/swift,johnno1962d/swift,Ivacker/swift,Jnosh/swift,devincoughlin/swift,atrick/swift,aschwaighofer/swift,milseman/swift,xwu/swift,dduan/swift,tkremenek/swift,swiftix/swift.old,emilstahl/swift,roambotics/swift,harlanhaskins/swift,zisko/swift,allevato/swift,atrick/swift,tardieu/swift,LeoShimonaka/swift,parkera/swift,swiftix/swift,roambotics/swift,dduan/swift,tardieu/swift,frootloops/swift,Ivacker/swift,tinysun212/swift-windows,shahmishal/swift,OscarSwanros/swift,lorentey/swift,swiftix/swift.old,ben-ng/swift,KrishMunot/swift,sschiau/swift,russbishop/swift,gmilos/swift,swiftix/swift,codestergit/swift,zisko/swift,lorentey/swift,jopamer/swift,ben-ng/swift,kusl/swift,kusl/swift,harlanhaskins/swift,austinzheng/swift,huonw/swift,hughbe/swift,cbrentharris/swift,MukeshKumarS/Swift,gottesmm/swift,ken0nek/swift,benlangmuir/swift,arvedviehweger/swift,kentya6/swift,shahmishal/swift,swiftix/swift,roambotics/swift,deyton/swift,alblue/swift,OscarSwanros/swift,johnno1962d/swift,uasys/swift,JGiola/swift,karwa/swift,adrfer/swift,gmilos/swift,kusl/swift,karwa/swift,cbrentharris/swift,brentdax/swift,hooman/swift,frootloops/swift,russbishop/swift,slavapestov/swift,kentya6/swift,alblue/swift,jmgc/swift,shahmishal/swift,glessard/swift,aschwaighofer/swift,ahoppen/swift,devincoughlin/swift,aschwaighofer/swift,modocache/swift,mightydeveloper/swift,milseman/swift,bitjammer/swift,JaSpa/swift,devincoughlin/swift,nathawes/swift,gribozavr/swift,hooman/swift,kperryua/swift,jmgc/swift,JaSpa/swift,JaSpa/swift,gmilos/swift,manavgabhawala/swift,parkera/swift,khizkhiz/swift,tardieu/swift,bitjammer/swift,johnno1962d/swift,stephentyrone/swift,sschiau/swift,airspeedswift/swift,tardieu/swift,Ivacker/swift,allevato/swift,deyton/swift,khizkhiz/swift,glessard/swift,dduan/swift,tinysun212/swift-windows,hooman/swift,hooman/swift,ken0nek/swift,gottesmm/swift,codestergit/swift,jtbandes/swift,apple/swift,LeoShimonaka/swift,russbishop/swift,swiftix/swift,jopamer/swift,tkremenek/swift,russbishop/swift,frootloops/swift,ahoppen/swift,amraboelela/swift,milseman/swift,lorentey/swift,kstaring/swift,zisko/swift,tjw/swift,emilstahl/swift,emilstahl/swift,austinzheng/swift,Ivacker/swift,parkera/swift,return/swift,airspeedswift/swift,jckarter/swift,shajrawi/swift,adrfer/swift,SwiftAndroid/swift,austinzheng/swift,mightydeveloper/swift,CodaFi/swift,milseman/swift,kstaring/swift,jopamer/swift,KrishMunot/swift,CodaFi/swift,therealbnut/swift,devincoughlin/swift,ken0nek/swift,kstaring/swift,benlangmuir/swift,kusl/swift,devincoughlin/swift,zisko/swift,gottesmm/swift,calebd/swift,nathawes/swift,gregomni/swift,practicalswift/swift,kstaring/swift,glessard/swift,sdulal/s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