Add self to svg and track watchlists

TBR=schenney@chromium.org
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/137973003

git-svn-id: svn://svn.chromium.org/blink/trunk@165386 bbb929c8-8fbe-4397-9dbb-9b2b20218538