GitLab

After refactoring WebUILoginScreen is owned by ExistingUserController.
Also, all users of GetLoginWindow() switched
to use LoginDisplayHost::GetNativeWindow() instead.
Views code from BaseLoginDisplayHost was moved to ViewsLoginDisplayHost.

BUG=chromium-os:21054,chromium-os:20946
TEST=unit_tests,browser_tests


Review URL: http://codereview.chromium.org/8395042

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@108077 0039d316-1c4b-4281-b951-d872f2087c98