[Linux] Listen to and correctly handle IPv6 address change announcements.
[Linux] Listen to and correctly handle IPv6 address change announcements.

BUG=36591
TEST=manually test that network change notifications happen at the right time.

Review URL: http://codereview.chromium.org/2881027

git-svn-id: http://src.chromium.org/svn/trunk/src@55171 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: ad16de7961f92ffcd05bc84741ab29da26af1bfe
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser