Enabling watchdog mailing list (watchdog-blink-watchlist@google.com) to monitor
changes that may impact the activity logger and watchdog extension.

These files are core web idl files, a few files that support activity logging,
and the code_generator_v8.pm file.

Review URL: https://codereview.chromium.org/68893015

git-svn-id: svn://svn.chromium.org/blink/trunk@162031 bbb929c8-8fbe-4397-9dbb-9b2b20218538