GitLab

It shows a graph of open/active sockets, open URL requests,
open DNS requests, up/down bandwidth, and disk cache
bandwidth.

BUG=99386
TEST=NetInternalsTest.NetInternalsTimelineView*

Review URL: http://codereview.chromium.org/8474001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@110553 0039d316-1c4b-4281-b951-d872f2087c98