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This replaces two uses of net::CookieOptions where we used to manually
set include_httponly and same_site_cookie_context to "strict", with
the recently added CookieOptions::MakeAllInclusive(), which does both
of those things automatically (and also sets do_not_update_access_time,
which doesn't matter because that field is not read for these two
usages). There isn't really any reason for this aside from saving a
few lines of code for readability and eliminating a member variable.

Bug: None
Change-Id: I2311e3cb8ea06301deb3eb72d86edfe986e8cf89
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1832302Reviewed-by: Maks Orlovich <morlovich@chromium.org>
Commit-Queue: Lily Chen <chlily@chromium.org>
Cr-Commit-Position: refs/heads/master@{#701586}