remove unneeded SK_SUPPORT_LEGACY_IMAGEFILTER_TO_COLORFILTER flag
remove unneeded SK_SUPPORT_LEGACY_IMAGEFILTER_TO_COLORFILTER flag

BUG=skia:
TBR=

Review URL: https://codereview.chromium.org/1120033003

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