Revert of Remove chromeos==0 blacklist for test_isolation_mode. (patchset #2 id:20001 of https://codereview.chromium.org/1214903013/)
Revert of Remove chromeos==0 blacklist for test_isolation_mode. (patchset #2 id:20001 of https://codereview.chromium.org/1214903013/)

Reason for revert:
fails 'compile on ChromiumOS x86-generic Compile, Link:

https://build.chromium.org/p/chromium.chromiumos/builders/ChromiumOS%20x86-generic%20Compile/builds/1797

Error like
[6346/6381] RULE interactive_ui_tests_run:
isolate_66259a49d84685497c67f134062c657d interactive_ui_tests.isolate
/* snip */
FAILED: cd ../../chrome; python ../tools/isolate_driver.py check --isolated
"../out_x86-generic/Release/interactive_ui_tests.isolated" --isolate
"interactive_ui_tests.isolate" /* snip */
Failed to find an input file: Input file
/b/build/slave/ChromiumOS_x86-generic_Compile/build/src/out_x86-generic/Release/nacl_irt_x86_64.nexe doesn't exist

Original issue's description:
> Remove chromeos==0 blacklist for test_isolation_mode.
>
> All of plain linux, chromeos work just fine and have been for a long time.
>
> iOS and Android are also using .isolate files but in a different enough way that
> it's not using test_isolation_mode==check, at least not yet.
>
> TBR=smut@chromium.org
> BUG=98637
>
> Committed: https://crrev.com/cf15207e009794f74915d9b10d2e838b0d0c86f2
> Cr-Commit-Position: refs/heads/master@{#337503}

TBR=smut@chromium.org,smut@google.com,maruel@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=98637

Review URL: https://codereview.chromium.org/1227583002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#337533}

Chilledheart/chromium,Just-D/chromium-1,Pluto-tv/chromium-crosswalk,axinging/chromium-crosswalk,Pluto-tv/chromium-crosswalk,axinging/chromium-crosswalk,Pluto-tv/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,hgl888/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,chuan9/chromium-crosswalk,Pluto-tv/chromium-crosswalk,Just-D/chromium-1,Pluto-tv/chromium-crosswalk,Chilledheart/chromium,axinging/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,Chilledheart/chromium,chuan9/chromium-crosswalk,axinging/chromium-crosswalk,chuan9/chromium-crosswalk,Just-D/chromium-1,axinging/chromium-crosswalk,chuan9/chromium-crosswalk,Chilledheart/chromium,Just-D/chromium-1,TheTypoMaster/chromium-crosswalk,chuan9/chromium-crosswalk,Just-D/chromium-1,chuan9/chromium-crosswalk,hgl888/chromium-crosswalk,axinging/chromium-crosswalk,hgl888/chromium-crosswalk,hgl888/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,hgl888/chromium-crosswalk,axinging/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,axinging/chromium-crosswalk,Chilledheart/chromium,TheTypoMaster/chromium-crosswalk,Chilledheart/chromium,Just-D/chromium-1,Pluto-tv/chromium-crosswalk,axinging/chromium-crosswalk,Chilledheart/chromium,Just-D/chromium-1,Just-D/chromium-1,Chilledheart/chromium,Pluto-tv/chromium-crosswalk,Pluto-tv/chromium-crosswalk,hgl888/chromium-crosswalk,axinging/chromium-crosswalk,hgl888/chromium-crosswalk,Chilledheart/chromium,axinging/chromium-crosswalk,Pluto-tv/chromium-crosswalk,hgl888/chromium-crosswalk,hgl888/chromium-crosswalk,chuan9/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,chuan9/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,Just-D/chromium-1,chuan9/chromium-crosswalk