DM: allow SKPs to be smaller than 1000x1000
DM: allow SKPs to be smaller than 1000x1000

This sniffs the .skp dimensions and intersects them with our 1000x1000 viewport.

This fixes things like desk_carsvg.skp, which is only 902 pixels tall.  In 565 now,
the remaining 98 pixels draw as black, which looks funny and is confusing to triage.

No apparent affect on DM memory usage.  (We're about to map the file anyway.)

BUG=skia:

Review URL: https://codereview.chromium.org/986103002

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