GitLab

- do not show user sign in promo
- do not show cloud print dialog link
- do not send COOKIES-based cloud printer search requests
- do not add Save as PDF printer
Related changes:
- fix UI issues when no printer is selected
- fix destination list sizing when one of the sections is empty

BUG=370096

Review URL: https://codereview.chromium.org/387073002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@282800 0039d316-1c4b-4281-b951-d872f2087c98