GitLab

This headerfile is required on newer systems.

BUG=none
TEST=print preview works after including the header file.


Review URL: http://codereview.chromium.org/7558008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@95905 0039d316-1c4b-4281-b951-d872f2087c98