Work on -Wunused-functions for linux.
Work on -Wunused-functions for linux.

BUG=315884
TBR=cevans

Review URL: https://codereview.chromium.org/66843007

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@161679 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