add dummy onDrawPicture to allow migration for chrome overrides
add dummy onDrawPicture to allow migration for chrome overrides

after this lands in chrome, land these two CLs
https://codereview.chromium.org/454993002/
https://codereview.chromium.org/454143003

then land this skia CL
https://codereview.chromium.org/448793004/

then remove the onDrawPicture overrides from chrome

R=fmalita@google.com, robertphillips@google.com

Author: reed@google.com

Review URL: https://codereview.chromium.org/457753002

AOSPB/external_skia,noselhq/skia,PAC-ROM/android_external_skia,rubenvb/skia,noselhq/skia,MinimalOS-AOSP/platform_external_skia,ominux/skia,Jichao/skia,rubenvb/skia,Jichao/skia,AOSP-YU/platform_external_skia,Omegaphora/external_chromium_org_third_party_skia,scroggo/skia,TeamTwisted/external_skia,qrealka/skia-hc,BrokenROM/external_skia,tmpvar/skia.cc,jtg-gg/skia,MinimalOS-AOSP/platform_external_skia,xin3liang/platform_external_chromium_org_third_party_skia,invisiblek/android_external_skia,qrealka/skia-hc,mydongistiny/external_chromium_org_third_party_skia,HalCanary/skia-hc,OneRom/external_skia,aosp-mirror/platform_external_skia,w3nd1go/android_external_skia,todotodoo/skia,aosp-mirror/platform_external_skia,nvoron23/skia,DiamondLovesYou/skia-sys,shahrzadmn/skia,mydongistiny/external_chromium_org_third_party_skia,MinimalOS/external_chromium_org_third_party_skia,VRToxin-AOSP/android_external_skia,boulzordev/android_external_skia,Fusion-Rom/external_chromium_org_third_party_skia,mydongistiny/external_chromium_org_third_party_skia,nvoron23/skia,qrealka/skia-hc,OneRom/external_skia,invisiblek/android_external_skia,todotodoo/skia,tmpvar/skia.cc,samuelig/skia,MyAOSP/external_chromium_org_third_party_skia,scroggo/skia,MarshedOut/android_external_skia,HalCanary/skia-hc,boulzordev/android_external_skia,geekboxzone/lollipop_external_chromium_org_third_party_skia,MyAOSP/external_chromium_org_third_party_skia,MarshedOut/android_external_skia,Fusion-Rom/external_chromium_org_third_party_skia,todotodoo/skia,android-ia/platform_external_chromium_org_third_party_skia,PAC-ROM/android_external_skia,nfxosp/platform_external_skia,rubenvb/skia,Igalia/skia,w3nd1go/android_external_skia,BrokenROM/external_skia,TeamExodus/external_skia,YUPlayGodDev/platform_external_skia,todotodoo/skia,tmpvar/skia.cc,TeamExodus/external_skia,Infinitive-OS/platform_external_skia,w3nd1go/android_external_skia,rubenvb/skia,AOSP-YU/platform_external_skia,PAC-ROM/android_external_skia,shahrzadmn/skia,jtg-gg/skia,Hikari-no-Tenshi/android_external_skia,vanish87/skia,YUPlayGodDev/platform_external_skia,geekboxzone/lollipop_external_chromium_org_third_party_skia,ench0/external_chromium_org_third_party_skia,PAC-ROM/android_external_skia,rubenvb/skia,Omegaphora/external_chromium_org_third_party_skia,MinimalOS/android_external_chromium_org_third_party_skia,rubenvb/skia,Omegaphora/external_chromium_org_third_party_skia,Infinitive-OS/platform_external_skia,nfxosp/platform_external_skia,YUPlayGodDev/platform_external_skia,jtg-gg/skia,YUPlayGodDev/platform_external_skia,DARKPOP/external_chromium_org_third_party_skia,nvoron23/skia,xin3liang/platform_external_chromium_org_third_party_skia,spezi77/android_external_skia,MonkeyZZZZ/platform_external_skia,amyvmiwei/skia,MIPS/external-chromium_org-third_party-skia,MinimalOS/external_chromium_org_third_party_skia,amyvmiwei/skia,AOSPB/external_skia,MinimalOS-AOSP/platform_external_skia,AOSP-YU/platform_external_skia,UBERMALLOW/external_skia,Infinitive-OS/platform_external_skia,jtg-gg/skia,AOSP-YU/platform_external_skia,FusionSP/external_chromium_org_third_party_skia,nfxosp/platform_external_skia,ominux/skia,TeamEOS/external_chromium_org_third_party_skia,MinimalOS/external_chromium_org_third_party_skia,MarshedOut/android_external_skia,chenlian2015/skia_from_google,rubenvb/skia,chenlian2015/skia_from_google,nfxosp/platform_external_skia,aosp-mirror/platform_external_skia,timduru/platform-external-skia,ench0/external_chromium_org_third_party_skia,MinimalOS/external_chromium_org_third_party_skia,UBERMALLOW/external_skia,Fusion-Rom/external_chromium_org_third_party_skia,TeamTwisted/external_skia,spezi77/android_external_skia,FusionSP/external_chromium_org_third_party_skia,google/skia,MinimalOS/external_chromium_org_third_party_skia,ominux/skia,MyAOSP/external_chromium_org_third_party_skia,OneRom/external_skia,pcwalton/skia,spezi77/android_external_skia,DiamondLovesYou/skia-sys,TeamEOS/external_chromium_org_third_party_skia,HalCanary/skia-hc,amyvmiwei/skia,PAC-ROM/android_external_skia,jtg-gg/skia,nfxosp/platform_external_skia,TeamTwisted/external_skia,timduru/platform-external-skia,samuelig/skia,chenlian2015/skia_from_google,amyvmiwei/skia,shahrzadmn/skia,Hikari-no-Tenshi/android_external_skia,w3nd1go/android_external_skia,MyAOSP/external_chromium_org_third_party_skia,w3nd1go/android_external_skia,geekboxzone/lollipop_external_chromium_org_third_party_skia,VRToxin-AOSP/android_external_skia,TeamExodus/external_skia,UBERMALLOW/external_skia,todotodoo/skia,nvoron23/skia,noselhq/skia,Omegaphora/external_chromium_org_third_party_skia,Jichao/skia,google/skia,Fusion-Rom/external_chromium_org_third_party_skia,ench0/external_chromium_org_third_party_skia,DARKPOP/external_chromium_org_third_party_skia,aosp-mirror/platform_external_skia,noselhq/skia,AOSPB/external_skia,AOSPB/external_skia,invisiblek/android_external_skia,w3nd1go/android_external_skia,samuelig/skia,tmpvar/skia.cc,chenlian2015/skia_from_google,MonkeyZZZZ/platform_external_ski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