Remove usage of uint8_t in WebMediaPlayer.h.
Remove usage of uint8_t in WebMediaPlayer.h.

BUG=243347
TEST=Everything still compiles.
R=abarth@chromium.org, acolwell@chromium.org

Review URL: https://codereview.chromium.org/15857006

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@151013 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