Add sign in dialog for GCP->print preview integration.

BUG=http://code.google.com/p/chromium-os/issues/detail?id=16082
TEST=Make sure you are signed out.  Open print preview. Choose sign in from the printer drop down.  Should be able to sign in with the resulting dialog.


Review URL: http://codereview.chromium.org/7518002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@98124 0039d316-1c4b-4281-b951-d872f2087c98
9 files changed