Implements the dialog view for logout confirmation dialog in public sessions.

Implements ash::internal::LogoutConfirmationDialogView which is supposed
to be used by ash::internal::LogoutButtonTray.

BUG=223846
TEST=new unit test

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=242286

Review URL: https://codereview.chromium.org/40053002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243530 0039d316-1c4b-4281-b951-d872f2087c98
google_apis: Stop accessing URLFetcher from ResponseWriter

To fix use-after-free

BUG=331822
TEST=See no crash after following the repro steps described in the BUG.

Review URL: https://codereview.chromium.org/127613002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243531 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243531