GitLab

- FILE_BROWSER_GALLERY_VIDEO_ERROR -> VIDEO_PLAYER_VIDEO_FILE_UNSUPPORTED
- FILE_BROWSER_GALLERY_VIDEO_DECODING_ERROR -> VIDEO_PLAYER_PLAYBACK_ERROR
- FILE_BROWSER_GALLERY_VIDEO_LOOPED_MODE -> IDS_VIDEO_PLAYER_LOOPED_MODE

BUG=none
TEST=none

Review URL: https://codereview.chromium.org/611243003

Cr-Commit-Position: refs/heads/master@{#300048}