Remove SK_LEGACY_DRAWPICTURECALLBACK from skia_for_chromium_defines.gypi
Remove SK_LEGACY_DRAWPICTURECALLBACK from skia_for_chromium_defines.gypi

The flag now lives in Chromium's SkUserConfig.h.

R=reed@google.com

Review URL: https://codereview.chromium.org/1133243009

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