This helps reclaiming memory used by the results when we don't need
them anymore.

BUG=492725

Change-Id: I4bc11be27b23589548120f0dc43e9979bf894089
Reviewed-on: https://chromium-review.googlesource.com/277808Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Dmitry Skiba <dskiba@google.com>
Tested-by: Dmitry Skiba <dskiba@google.com>
Reviewed-by: Dmitry Skiba <dskiba@google.com>