Prevent derived classes of GuestViewBase from overriding key methods

This change removes the obligation for the derived class to call the base class' implementation at the end. This makes it easier to write GuestViewBase derived classes.

BUG=364141 330264

Review URL: https://codereview.chromium.org/318433002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@274801 0039d316-1c4b-4281-b951-d872f2087c98
4 files changed