Download on Android Q: Remove a DCHECK in CreateReservation.

When resuming a download, the suggested path can be content URI. This
will hit a DCHECK in CreateReservation.

Bug: 1045642
Change-Id: I61c452afafbbc9606f747c84ff18e6b9dc9a0fb6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2062759Reviewed-by: Min Qin <qinmin@chromium.org>
Commit-Queue: Xing Liu <xingliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#742270}

components/download/internal/common/download_path_reservation_tracker.cc

@@ -325,8 +325,6 @@ PathValidationResult ValidatePathAndResolveConflicts(
 // - Returns the result of creating the path reservation.
 PathValidationResult CreateReservation(const CreateReservationInfo& info,
                                        base::FilePath* reserved_path) {
-  DCHECK(info.suggested_path.IsAbsolute());
-
   // Create a reservation map if one doesn't exist. It will be automatically
   // deleted when all the reservations are revoked.
   if (g_reservation_map == NULL)