restore old convention of asserting refcnt==1 in destructor
restore old convention of asserting refcnt==1 in destructor

BUG=skia:

Review URL: https://codereview.chromium.org/757563003

Jichao/skia,amyvmiwei/skia,tmpvar/skia.cc,scroggo/skia,VRToxin-AOSP/android_external_skia,boulzordev/android_external_skia,HalCanary/skia-hc,OneRom/external_skia,HalCanary/skia-hc,chenlian2015/skia_from_google,UBERMALLOW/external_skia,TeamTwisted/external_skia,TeamExodus/external_skia,TeamTwisted/external_skia,MarshedOut/android_external_skia,w3nd1go/android_external_skia,HalCanary/skia-hc,geekboxzone/mmallow_external_skia,tmpvar/skia.cc,MinimalOS-AOSP/platform_external_skia,timduru/platform-external-skia,TeamTwisted/external_skia,BrokenROM/external_skia,scroggo/skia,Infinitive-OS/platform_external_skia,MarshedOut/android_external_skia,TeamTwisted/external_skia,AOSP-YU/platform_external_skia,DiamondLovesYou/skia-sys,google/skia,OneRom/external_skia,samuelig/skia,MonkeyZZZZ/platform_external_skia,Hikari-no-Tenshi/android_external_skia,spezi77/android_external_skia,qrealka/skia-hc,MinimalOS-AOSP/platform_external_skia,HalCanary/skia-hc,noselhq/skia,samuelig/skia,boulzordev/android_external_skia,HalCanary/skia-hc,w3nd1go/android_external_skia,scroggo/skia,OneRom/external_skia,w3nd1go/android_external_skia,jtg-gg/skia,geekboxzone/mmallow_external_skia,jtg-gg/skia,nfxosp/platform_external_skia,Jichao/skia,spezi77/android_external_skia,vanish87/skia,VRToxin-AOSP/android_external_skia,VRToxin-AOSP/android_external_skia,chenlian2015/skia_from_google,rubenvb/skia,MarshedOut/android_external_skia,Infinitive-OS/platform_external_skia,noselhq/skia,YUPlayGodDev/platform_external_skia,noselhq/skia,UBERMALLOW/external_skia,google/skia,w3nd1go/android_external_skia,Hikari-no-Tenshi/android_external_skia,AOSPB/external_skia,TeamExodus/external_skia,VRToxin-AOSP/android_external_skia,MinimalOS-AOSP/platform_external_skia,boulzordev/android_external_skia,AOSP-YU/platform_external_skia,YUPlayGodDev/platform_external_skia,rubenvb/skia,shahrzadmn/skia,w3nd1go/android_external_skia,chenlian2015/skia_from_google,BrokenROM/external_skia,invisiblek/android_external_skia,Jichao/skia,PAC-ROM/android_external_skia,nfxosp/platform_external_skia,MinimalOS-AOSP/platform_external_skia,scroggo/skia,vanish87/skia,pcwalton/skia,tmpvar/skia.cc,vanish87/skia,MinimalOS-AOSP/platform_external_skia,Hikari-no-Tenshi/android_external_skia,TeamExodus/external_skia,AOSPB/external_skia,TeamExodus/external_skia,PAC-ROM/android_external_skia,jtg-gg/skia,samuelig/skia,UBERMALLOW/external_skia,aosp-mirror/platform_external_skia,AOSPB/external_skia,nfxosp/platform_external_skia,qrealka/skia-hc,rubenvb/skia,OneRom/external_skia,w3nd1go/android_external_skia,scroggo/skia,invisiblek/android_external_skia,nvoron23/skia,tmpvar/skia.cc,google/skia,aosp-mirror/platform_external_skia,Jichao/skia,ominux/skia,YUPlayGodDev/platform_external_skia,pcwalton/skia,geekboxzone/mmallow_external_skia,aosp-mirror/platform_external_skia,AOSP-YU/platform_external_skia,TeamTwisted/external_skia,invisiblek/android_external_skia,MonkeyZZZZ/platform_external_skia,DiamondLovesYou/skia-sys,Infinitive-OS/platform_external_skia,rubenvb/skia,spezi77/android_external_skia,HalCanary/skia-hc,Igalia/skia,jtg-gg/skia,tmpvar/skia.cc,Igalia/skia,noselhq/skia,AOSPB/external_skia,pcwalton/skia,chenlian2015/skia_from_google,shahrzadmn/skia,vanish87/skia,geekboxzone/mmallow_external_skia,ominux/skia,aosp-mirror/platform_external_skia,MonkeyZZZZ/platform_external_skia,samuelig/skia,timduru/platform-external-skia,jtg-gg/skia,nvoron23/skia,boulzordev/android_external_skia,google/skia,Jichao/skia,HalCanary/skia-hc,BrokenROM/external_skia,w3nd1go/android_external_skia,Hikari-no-Tenshi/android_external_skia,nfxosp/platform_external_skia,timduru/platform-external-skia,MonkeyZZZZ/platform_external_skia,tmpvar/skia.cc,Infinitive-OS/platform_external_skia,TeamExodus/external_skia,amyvmiwei/skia,MarshedOut/android_external_skia,aosp-mirror/platform_external_skia,invisiblek/android_external_skia,VRToxin-AOSP/android_external_skia,qrealka/skia-hc,nfxosp/platform_external_skia,MonkeyZZZZ/platform_external_skia,pcwalton/skia,tmpvar/skia.cc,rubenvb/skia,shahrzadmn/skia,geekboxzone/mmallow_external_skia,rubenvb/skia,Jichao/skia,noselhq/skia,AOSPB/external_skia,nvoron23/skia,aosp-mirror/platform_external_skia,google/skia,rubenvb/skia,MarshedOut/android_external_skia,shahrzadmn/skia,pcwalton/skia,todotodoo/skia,spezi77/android_external_skia,ominux/skia,YUPlayGodDev/platform_external_skia,Infinitive-OS/platform_external_skia,AOSP-YU/platform_external_skia,samuelig/skia,nvoron23/skia,qrealka/skia-hc,nfxosp/platform_external_skia,OneRom/external_skia,Infinitive-OS/platform_external_skia,HalCanary/skia-hc,amyvmiwei/skia,spezi77/android_external_skia,invisiblek/android_external_skia,Jichao/skia,todotodoo/skia,noselhq/skia,AOSP-YU/platform_external_skia,MarshedOut/android_external_skia,AOSP-YU/platform_external_skia,rubenvb/skia,pcwalton/skia,UBERMALLOW/external_skia,VRToxin-AOSP/android_external_skia,todotodoo/skia,HalCanary/skia-hc,UBERMALLOW/external_skia,boulzordev/android_external_skia,scroggo/skia,tmpvar/skia.cc,aosp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