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This is the set of tests that do not require any change to run as part
of extensions_unittests suite.

BUG=397165
TEST=extensions_unittests
R=jamescook@chromium.org
TBR=yoz@chromium.org

Review URL: https://codereview.chromium.org/504593002

Cr-Commit-Position: refs/heads/master@{#291620}