Create the correct SiteInstance when restoring tabs that belong to apps.

BUG=89371
TEST=see bug


Review URL: http://codereview.chromium.org/7448012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@93337 0039d316-1c4b-4281-b951-d872f2087c98
6 files changed