GitLab

This CL starts to use the new separated gallery without specifying the
file-manager-enable-new-gallery flag.

BUG=358698
TEST=none

Review URL: https://codereview.chromium.org/285373015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@271546 0039d316-1c4b-4281-b951-d872f2087c98