Putting the shelf menu multi profile feature behind a flag.

In addition to the multi user flag, the shelf menu's multi user functionality has to be moved behind an additional flag.

BUG=294234
TEST=visual

Review URL: https://chromiumcodereview.appspot.com/23464097

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224579 0039d316-1c4b-4281-b951-d872f2087c98
Fix copypasto: QuicClockTest -> QuicEpollClockTest.

BUG=NONE
R=rch@chromium.org

Review URL: https://chromiumcodereview.appspot.com/23465035

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224580 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224580
Updating messaging for Google Virtual Card.

BUG=295800

Review URL: https://chromiumcodereview.appspot.com/23466016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224581 0039d316-1c4b-4281-b951-d872f2087c98
[rac] Fix the section container width: 440px

This patch changes the rac section container to be 440px. (Previously,
http://crrev.com/224301 has set the width to 420px.)

BUG=294467

Review URL: https://chromiumcodereview.appspot.com/23483057

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224582 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224582