Remove bogus assert
Remove bogus assert

content key can be set after pending io scheduled (e.g. when scaling up a npot texture to pot).

BUG=skia:2889
TBR=robertphillips@google.com

Review URL: https://codereview.chromium.org/693843004

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