Fix one last BEST_EFFORT task blocking extension file loads.

commit 60ea85d4f73dba5765581e6c47093d8d204ebfa1 added a
NoBestEffortTasksTest for extension loading/messaging, and fixed a
couple of cases where BEST_EFFORT tasks were being schedules (and never
run). Unfortunately, I missed one. This change fixes that and updates
the test to exercise the additional code path (the one that runs when
the file is >64 KB in size).

Bug: 926613
Change-Id: I1f824fee774e57a461376ebeb19b78d941dbce87
Reviewed-on: https://chromium-review.googlesource.com/c/1445091
Reviewed-by: Fran├žois Doray <fdoray@chromium.org>
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Commit-Queue: Fran├žois Doray <fdoray@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#628104}(cherry picked from commit bf1a14e8a8caacf1c758cb86eb7e9f2a93116447)
Reviewed-on: https://chromium-review.googlesource.com/c/1450589
Reviewed-by: Yuri Wiitala <miu@chromium.org>
Cr-Commit-Position: refs/branch-heads/3683@{#138}
Cr-Branched-From: e51029943e0a38dd794b73caaf6373d5496ae783-refs/heads/master@{#625896}
3 files changed