Non-SFI mode: Quick workaround of unexpected CHECK failure.
Non-SFI mode: Quick workaround of unexpected CHECK failure.

Recently, crrev.com/418423002 is landed, but it has a bug in Non-SFI mode.
It introduces CHECK for the file token in ManifestService::OpenResource().
However, in Non-SFI mode, there is no NaClIPCAdapter, so the token is passed
from the renderer directly. (Actually the IPC channel is connected directly
to the renderer).
As a result, if the renderer fills the file token properly, it crashes.
As far as I investigated, it happens, at least, when the fast-path is triggered
(i.e. OpenNaClExecutable works in DownloadFile in ppb_nacl_private_impl.cc).
Anyway, we can ignore file tokens in Non-SFI mode, because it is for
SFI NaCl's validation cache.

BUG=394130
TEST=Ran trybots. Patched locally and run our Non-SFI NaCl app.
CQ_EXTRA_TRYBOTS=tryserver.chromium.linux:linux_rel_precise32

Review URL: https://codereview.chromium.org/560983003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#294396}

markYoungH/chromium.src,Jonekee/chromium.src,mohamed--abdel-maksoud/chromium.src,axinging/chromium-crosswalk,jaruba/chromium.src,hgl888/chromium-crosswalk,krieger-od/nwjs_chromium.src,fujunwei/chromium-crosswalk,chuan9/chromium-crosswalk,dednal/chromium.src,chuan9/chromium-crosswalk,axinging/chromium-crosswalk,Fireblend/chromium-crosswalk,M4sse/chromium.src,Chilledheart/chromium,fujunwei/chromium-crosswalk,crosswalk-project/chromium-crosswalk-efl,TheTypoMaster/chromium-crosswalk,hgl888/chromium-crosswalk,hgl888/chromium-crosswalk,hgl888/chromium-crosswalk-efl,crosswalk-project/chromium-crosswalk-efl,Jonekee/chromium.src,dednal/chromium.src,markYoungH/chromium.src,dednal/chromium.src,Jonekee/chromium.src,jaruba/chromium.src,Jonekee/chromium.src,TheTypoMaster/chromium-crosswalk,dednal/chromium.src,hgl888/chromium-crosswalk,ltilve/chromium,fujunwei/chromium-crosswalk,fujunwei/chromium-crosswalk,Jonekee/chromium.src,Just-D/chromium-1,chuan9/chromium-crosswalk,Just-D/chromium-1,crosswalk-project/chromium-crosswalk-efl,mohamed--abdel-maksoud/chromium.src,Pluto-tv/chromium-crosswalk,fujunwei/chromium-crosswalk,M4sse/chromium.src,TheTypoMaster/chromium-crosswalk,Pluto-tv/chromium-crosswalk,axinging/chromium-crosswalk,dushu1203/chromium.src,Jonekee/chromium.src,dushu1203/chromium.src,dushu1203/chromium.src,PeterWangIntel/chromium-crosswalk,dushu1203/chromium.src,crosswalk-project/chromium-crosswalk-efl,axinging/chromium-crosswalk,krieger-od/nwjs_chromium.src,Pluto-tv/chromium-crosswalk,krieger-od/nwjs_chromium.src,Fireblend/chromium-crosswalk,Just-D/chromium-1,Pluto-tv/chromium-crosswalk,Chilledheart/chromium,PeterWangIntel/chromium-crosswalk,Jonekee/chromium.src,crosswalk-project/chromium-crosswalk-efl,axinging/chromium-crosswalk,Chilledheart/chromium,dednal/chromium.src,crosswalk-project/chromium-crosswalk-efl,PeterWangIntel/chromium-crosswalk,axinging/chromium-crosswalk,markYoungH/chromium.src,Chilledheart/chromium,TheTypoMaster/chromium-crosswalk,jaruba/chromium.src,markYoungH/chromium.src,TheTypoMaster/chromium-crosswalk,hgl888/chromium-crosswalk-efl,PeterWangIntel/chromium-crosswalk,Fireblend/chromium-crosswalk,Fireblend/chromium-crosswalk,markYoungH/chromium.src,jaruba/chromium.src,Jonekee/chromium.src,krieger-od/nwjs_chromium.src,markYoungH/chromium.src,M4sse/chromium.src,Chilledheart/chromium,Jonekee/chromium.src,axinging/chromium-crosswalk,Chilledheart/chromium,Pluto-tv/chromium-crosswalk,ltilve/chromium,Chilledheart/chromium,mohamed--abdel-maksoud/chromium.src,fujunwei/chromium-crosswalk,M4sse/chromium.src,M4sse/chromium.src,hgl888/chromium-crosswalk-efl,Fireblend/chromium-crosswalk,dushu1203/chromium.src,ltilve/chromium,markYoungH/chromium.src,PeterWangIntel/chromium-crosswalk,Fireblend/chromium-crosswalk,Pluto-tv/chromium-crosswalk,hgl888/chromium-crosswalk-efl,hgl888/chromium-crosswalk-efl,Fireblend/chromium-crosswalk,jaruba/chromium.src,Jonekee/chromium.src,markYoungH/chromium.src,M4sse/chromium.src,fujunwei/chromium-crosswalk,axinging/chromium-crosswalk,dednal/chromium.src,markYoungH/chromium.src,jaruba/chromium.src,krieger-od/nwjs_chromium.src,M4sse/chromium.src,Chilledheart/chromium,hgl888/chromium-crosswalk,crosswalk-project/chromium-crosswalk-efl,ltilve/chromium,crosswalk-project/chromium-crosswalk-efl,dushu1203/chromium.src,hgl888/chromium-crosswalk-efl,markYoungH/chromium.src,dednal/chromium.src,dednal/chromium.src,chuan9/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,Just-D/chromium-1,Jonekee/chromium.src,dednal/chromium.src,jaruba/chromium.src,mohamed--abdel-maksoud/chromium.src,dushu1203/chromium.src,Just-D/chromium-1,M4sse/chromium.src,mohamed--abdel-maksoud/chromium.src,chuan9/chromium-crosswalk,Fireblend/chromium-crosswalk,krieger-od/nwjs_chromium.src,Just-D/chromium-1,mohamed--abdel-maksoud/chromium.src,Pluto-tv/chromium-crosswalk,hgl888/chromium-crosswalk,ltilve/chromium,jaruba/chromium.src,axinging/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,TheTypoMaster/chromium-crosswalk,jaruba/chromium.src,Fireblend/chromium-crosswalk,krieger-od/nwjs_chromium.src,crosswalk-project/chromium-crosswalk-efl,dushu1203/chromium.src,Pluto-tv/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,jaruba/chromium.src,chuan9/chromium-crosswalk,Just-D/chromium-1,dushu1203/chromium.src,dednal/chromium.src,jaruba/chromium.src,chuan9/chromium-crosswalk,Just-D/chromium-1,ltilve/chromium,Pluto-tv/chromium-crosswalk,Just-D/chromium-1,dednal/chromium.src,chuan9/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,PeterWangIntel/chromium-crosswalk,hgl888/chromium-crosswalk-efl,krieger-od/nwjs_chromium.src,krieger-od/nwjs_chromium.src,TheTypoMaster/chromium-crosswalk,hgl888/chromium-crosswalk-efl,fujunwei/chromium-crosswalk,ltilve/chromium,mohamed--abdel-maksoud/chromium.src,dushu1203/chromium.src,M4sse/chromium.src,axinging/chromium-crosswalk,hgl888/chromium-crosswalk,krieger-od/nwjs_chromium.src,hgl888/chromium-crosswalk,ltilve/chromium,hgl888/chromium-crosswalk-ef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