Revert of Reapply "Media Galleries API Metadata: Image metadata" (https://codereview.chromium.org/
216443005/)
Reason for revert:
Breaking Mac 10.6 release testers. (no idea why, but it is)
Original issue's description:
> Reapply "Media Galleries API Metadata: Image metadata"
>
> Original patch (also PS1) https://codereview.chromium.org/
191583002
>
> CQ can't catch the breakages of this patch.
>
> TBR=
> BUG=318450
>
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=261864
TBR=ccameron@chromium.org,thestig@chromium.org,grt@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=318450
Review URL: https://codereview.chromium.org/
225023014
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@261895 0039d316-1c4b-4281-b951-d872f2087c98