Polymerizing Clusters, starting with the word cloud.

BUG=skia:
TBR=stephana
NOTREECHECKS=true

Review URL: https://codereview.chromium.org/686143003
Fix styling of login/logout so it is more responsive.

BUG=skia:
NOTREECHECKS=true

Review URL: https://codereview.chromium.org/686083003