In the current implmentation of CookieServiceChild::SetCookieString, pass a null channel will crash the child process. This is because we call aChannel->GetURI() without checking if aChannel is null.
However, set cookie with a null channel is possible in non-e10s mode. To make sure the behavior to be consistent in both non-e10s and e10s mode, we have to pass an empty URIParams in child process.
Differential Revision: https://phabricator.services.mozilla.com/D5432
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extra : rebase_source : 0d5b78130661fd02d9906e41f30c69ffdfca650b
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