Remove deprecated methods from WebMediaPlayer
Remove deprecated methods from WebMediaPlayer

The implementations were removed from chromium in http://crrev.com/204601
and http://crrev.com/205299.

R=abarth

Review URL: https://chromiumcodereview.appspot.com/16077016

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@152191 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