Support for --quick-enable-cf in the installer.

After installing chrome with multi-install, you can run setup from the Installer folder with --quick-enable-cf to install Chrome Frame from the same location (using the same binaries).  The operation is quick since all the shared binaries are already there and only need to be registered.

NOTE: The switch needs to be coupled with --system-level for system installs and always requires --multi-install.

TEST=After installing Chrome with --multi-install, run setup from the Installer folder with --quick-enable-cf --multi-install.  For system installations also remember to include --system-level.  Chrome Frame should then be installed as well from the same folder in multi mode.
BUG=none

Review URL: http://codereview.chromium.org/6349098

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@74000 0039d316-1c4b-4281-b951-d872f2087c98
9 files changed