Update network_location_provider_unittest to use GetSafeWeakWrapper.

When using GetSafeWeakWrapper, Detach() is called automatically, so
tests don't need to call it themselves.

Bug: 924960
Change-Id: I12cda3b41951d2d2fabd9a8c680abdbad610904e
Reviewed-on: https://chromium-review.googlesource.com/c/1466783
Reviewed-by: Tim Volodine <timvolodine@chromium.org>
Commit-Queue: Lowell Manners <lowell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#631621}
1 file changed