This reverts (part of) commit 6c131c38.

Reason for revert: pak file got wrongly included

Original change's description:
> Use common App Service profile checks for incognito redirect.
> 
> https://crrev.com/c/2318888 added a "GetOriginalProfile" call to fix a
> crash in incognito. Unfortunally that introduced a new crash for Guest
> sessions. GetOriginalProfile() returns something that crashes when
> trying to open a browser - see https://crbug.com/1121553. Add a new
> method to AppService to handle the profile redirects correctly and in a
> single place.
> 
> Also adds more tests.
> 
> Bug: 1122480
> Change-Id: I63e3d2766d61b416d1e7590bc67a937b817848ed
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2381230
> Reviewed-by: Dominick Ng <dominickn@chromium.org>
> Reviewed-by: Trent Apted <tapted@chromium.org>
> Commit-Queue: Rachel Carpenter <carpenterr@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#803399}

TBR=tapted@chromium.org,dominickn@chromium.org,carpenterr@chromium.org

Change-Id: If4f71581eddd4cffbd4a61ccef6bdee9f3c891f3
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1122480
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2386909
Commit-Queue: Rachel Carpenter <carpenterr@chromium.org>
Reviewed-by: Rachel Carpenter <carpenterr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#803410}