Remove OwnPtr::release() calls in modules/ (part 3).
OwnPtr::release() calls can be (1) replaced with std::move(), or
(2) removed entirely (in certain "return" statements).
BUG=
611660
CQ_INCLUDE_TRYBOTS=tryserver.chromium.win:win_optional_gpu_tests_rel;tryserver.chromium.mac:mac_optional_gpu_tests_rel
Committed:
https://crrev.com/02fe34d8ada84b71beff44331fe7b971b0390ccc
Cr-Commit-Position: refs/heads/master@{#393806}