Fix GetPendingItemWithIndexedPendingEntry for slim nav.

Stub mock_wk_list_'s currentURL to avoid DCHECK inside CommitPendingItem

Bug: 899827
Change-Id: I69f9943e815e06ba51280c2b71b4f10d1d81aa1c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1536462
Commit-Queue: Justin Cohen <justincohen@chromium.org>
Auto-Submit: Eugene But <eugenebut@chromium.org>
Reviewed-by: Justin Cohen <justincohen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#643680}
1 file changed