Add remove account UI to the new avatar bubble.

Side note: this only allows the deletion of secondary accounts.

BUG=311111
TEST=With the --new-profile-management and --enable-inline-signin
flags, start chrome, and sign in a profile. Through the avatar bubble
add a secondary account. Once it's added to the list, you should be able
to see a little x next to it, and pressing it will delete it from the list.

Review URL: https://codereview.chromium.org/60733026

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235476 0039d316-1c4b-4281-b951-d872f2087c98
[Media Galleries] Add originals handling to iphoto data provider

R=vandebo@chromium.org
BUG=151703

Review URL: https://codereview.chromium.org/61393003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235477 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 235477