Oilpan: fix build after r186604.
Oilpan: fix build after r186604.

TBR=oilpan-reviews,haraken
BUG=431689
NOTRY=true

Review URL: https://codereview.chromium.org/750863004

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@186622 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