commit def38083bf08ec479bcb340b8f8c6c5529498dd3
author sque <sque@chromium.org> Fri May 12 17:45:48 2017
committer Commit bot <commit-bot@chromium.org> Fri May 12 17:45:48 2017
tree 479a4a5cd1f82d6d2151c90766a93a31f3c743dd
parent fc093d3e84762bfd20224adf0e73b49d2ad34247

Add new SystemLogsSource type: SingleLogSource

This patch adds a new type of SystemLogsSource, SingleLogSource, which
provides a single log source in contrast to the many log sources provided
by the other implementations of SystemLogsSource.

The SingleLogSource currently supports incremental read of a limited set
of log files. It can be expanded to include other log files and other log
sources.

BUG=chromium:715263

Review-Url: https://codereview.chromium.org/2844163005
Cr-Commit-Position: refs/heads/master@{#471353}