Fix UMA count for MediaGalleries.Usage.Profiles With API Usage.

BUG=NONE

Review URL: https://codereview.chromium.org/170643003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252314 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252314