Fix variable shadowing in SkMorphologyImageFilter
Fix variable shadowing in SkMorphologyImageFilter

Review URL: https://codereview.chromium.org/1245883005

ominux/skia,aosp-mirror/platform_external_skia,nvoron23/skia,ominux/skia,qrealka/skia-hc,HalCanary/skia-hc,tmpvar/skia.cc,qrealka/skia-hc,rubenvb/skia,google/skia,HalCanary/skia-hc,tmpvar/skia.cc,noselhq/skia,todotodoo/skia,google/skia,vanish87/skia,qrealka/skia-hc,tmpvar/skia.cc,google/skia,ominux/skia,qrealka/skia-hc,google/skia,Hikari-no-Tenshi/android_external_skia,vanish87/skia,shahrzadmn/skia,vanish87/skia,Hikari-no-Tenshi/android_external_skia,noselhq/skia,vanish87/skia,nvoron23/skia,ominux/skia,nvoron23/skia,HalCanary/skia-hc,rubenvb/skia,rubenvb/skia,rubenvb/skia,qrealka/skia-hc,todotodoo/skia,aosp-mirror/platform_external_skia,ominux/skia,aosp-mirror/platform_external_skia,noselhq/skia,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,tmpvar/skia.cc,qrealka/skia-hc,tmpvar/skia.cc,shahrzadmn/skia,todotodoo/skia,qrealka/skia-hc,google/skia,vanish87/skia,noselhq/skia,noselhq/skia,google/skia,Hikari-no-Tenshi/android_external_skia,rubenvb/skia,HalCanary/skia-hc,nvoron23/skia,shahrzadmn/skia,rubenvb/skia,tmpvar/skia.cc,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,vanish87/skia,qrealka/skia-hc,nvoron23/skia,todotodoo/skia,shahrzadmn/skia,HalCanary/skia-hc,tmpvar/skia.cc,nvoron23/skia,noselhq/skia,Hikari-no-Tenshi/android_external_skia,rubenvb/skia,noselhq/skia,ominux/skia,ominux/skia,shahrzadmn/skia,vanish87/skia,vanish87/skia,HalCanary/skia-hc,google/skia,aosp-mirror/platform_external_skia,todotodoo/skia,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,rubenvb/skia,google/skia,todotodoo/skia,nvoron23/skia,noselhq/skia,aosp-mirror/platform_external_skia,tmpvar/skia.cc,tmpvar/skia.cc,noselhq/skia,ominux/skia,shahrzadmn/skia,shahrzadmn/skia,google/skia,nvoron23/skia,vanish87/skia,shahrzadmn/skia,Hikari-no-Tenshi/android_external_skia,HalCanary/skia-hc,todotodoo/skia,shahrzadmn/skia,rubenvb/skia,google/skia,Hikari-no-Tenshi/android_external_skia,ominux/skia,HalCanary/skia-hc,todotodoo/skia,aosp-mirror/platform_external_skia,nvoron23/skia,HalCanary/skia-hc,HalCanary/skia-hc,todotodoo/skia,rubenvb/skia