[SiteChip] Draw site chip icon and site title. Drag support.

BUG=315944
R=pkasting@chromium.org
TBR=cpu

Review URL: https://codereview.chromium.org/92073003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240175 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 240175