Fix memory leak in SkPictureRecord
Fix memory leak in SkPictureRecord

Review URL: https://codereview.chromium.org/1197283007

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