GitLab

Avoid importing net.html in the top level and instead have the files that
use it importing it themselves.

NOTRY=true

Review URL: https://codereview.chromium.org/467013002

git-svn-id: svn://svn.chromium.org/blink/trunk@180123 bbb929c8-8fbe-4397-9dbb-9b2b20218538