GitLab

OnBufferingUpdate does not work for local resources. Because of this
the buffered range does not get updated. This patch updates the bufferd
range atleast untill the video has played so that media controls can be
painted properly.

TBR=abarth@chromium.org
BUG=405474

Review URL: https://codereview.chromium.org/496683002

Cr-Commit-Position: refs/heads/master@{#292837}