Call base::circular_deque::shrink_to_fit() in one more place.

Remove comment about shrink_to_fit() being missing in some STL deque
implementations, along with manual shrink_to_fit() equivalent.

Change-Id: I0b4443731755a98ea63b44830db3261577af6bfc
Reviewed-on: https://chromium-review.googlesource.com/c/1388394
Commit-Queue: Gabriel Charette <[email protected]>
Reviewed-by: Gabriel Charette <[email protected]>
Cr-Commit-Position: refs/heads/master@{#618632}
1 file changed