Use a deque in ResourcePool instead of a list.

Find in a list is terribly slow. Deques are much faster.

R=reveman
BUG=487387
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1151573004

Cr-Commit-Position: refs/heads/master@{#332102}
1 file changed