Show register promos at the top of the cloud print printer list

Show registration promos in the cloud print printer list, and always show them
on top regardless of when they come in.

BUG=

Review URL: https://codereview.chromium.org/140813003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247364 0039d316-1c4b-4281-b951-d872f2087c98
Blink roll 165865:165883

http://build.chromium.org/f/chromium/perf/dashboard/ui/changelog_blink.html?url=/trunk&range=165866:165883&mode=html
TBR=
BUG=

Review URL: https://codereview.chromium.org/148623002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247365 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247366 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247366