[Media Galleries] iPhoto file util for originals.

R=vandebo@chromium.org
BUG=151703

Review URL: https://codereview.chromium.org/67743004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236429 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236429