Default to the user's given name when changing to the GAIA photo

Screenshot: https://docs.google.com/file/d/0B1B1Up4p2NRMYkJHU1pVOGR0WGs/edit?usp=sharing

BUG=304936
TEST=Use the --gaia-profile-info flag. Sign in a profile. Go to chrome://settings, select the signed-in
user and press "Edit". Switch to a different avatar icon, and then back
to the GAIA one. The textbox should display the first name, not the full
name.

Review URL: https://codereview.chromium.org/26340004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227891 0039d316-1c4b-4281-b951-d872f2087c98
[MediaGalleries] Track initializations of the media galleries profile object.

Also track "incorrect" initializations to determine if there is a bug
causing the object to initialize non-lazily.

R=vandebo@chromium.org

Review URL: https://codereview.chromium.org/26386002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227892 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227892
Blink roll 159214:159247

http://build.chromium.org/f/chromium/perf/dashboard/ui/changelog_blink.html?url=/trunk&range=159215:159247&mode=html
TBR=
BUG=

Review URL: https://codereview.chromium.org/26567008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227893 0039d316-1c4b-4281-b951-d872f2087c98
Make chromeos::UserManager::GetUserByProfile public.

BUG=302124

Review URL: https://codereview.chromium.org/26592005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227894 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227895 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227893
SVN changes up to revision 227895