Make chrome the default browser interactively if possible, register it if not.

This will pop the Greg dialog on Win8 when the installer is run as an interactive user with --make-chrome-default.

BUG=133119,113326
TEST=on win8: install chrome with --make-chrome-default 1) at user-level, 2) at system-level as a regular user, 3) at system-level as SYSTEM.  1 and 2 should show the default browser dialog, whereas 3 should just register it so that a user can make it the default without uac.  on win7: everything should work as before.


Review URL: https://chromiumcodereview.appspot.com/10558015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@142727 0039d316-1c4b-4281-b951-d872f2087c98
4 files changed