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This fixes unresolved references in the linux chromiumos ozone
shared_library build.

BUG=445627
TEST=gn gen out_gn_ozone --args='os="chromeos" use_ozone=true is_component_build=true' &&
  ninja -C out_gn_ozone chrome ozone_unittests (along with other needed changes)

Review URL: https://codereview.chromium.org/895263002

Cr-Commit-Position: refs/heads/master@{#314583}