Oilpan: fix build after r180052.
Oilpan: fix build after r180052.

TBR=haraken,oilpan-reviews
BUG=383813
NOTRY=true

Review URL: https://codereview.chromium.org/460983002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@180061 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs