Refresh the destination list when the register promo printer is done registering

When the user is done registering a printer using the privet registration promos
in the print preview, refresh the destination list.

BUG=326718

Review URL: https://codereview.chromium.org/109473006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242793 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 242793
wrap stray switches::kDisableWebRtcHWEncoding in ifdefs

Followup from https://codereview.chromium.org/74563002

TEST=Build with enable_webrtc=0
BUG=313115

Review URL: https://codereview.chromium.org/115063004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242794 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 242794
QUIC - minor cleanup changes to match internal source.

R=rch@chromium.org

Review URL: https://codereview.chromium.org/118813002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242795 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 242795