This change introduces two new side-by-side channels for Google Chrome.
Chrome Beta can be installed via the --chrome-beta installer command
line switch, while Chrome Dev can be installed via the --chrome-dev
switch. Such installs have the following qualities:

- They install in ...\Google\Chrome (Beta,Dev)\Application (both
  per-machine and per-user installs are supported).
- They store their User Data directories in %LOCALAPPDATA%\Google\Chrome
  (Beta,Dev)\User Data.
- They register with Google Update under distinct appguids:
  - Beta: {8237E44A-0054-442C-B6B6-EA0509993955}
  - Dev : {401C381F-E0DE-4B85-8BD8-3F3F14FBDA57}
- Their shortcuts, taskbar, and Start Menu icons are badged with "Beta"
  or "Dev", as appropriate.
- While they will not prompt the user to be made the user's default
  browser, they support being made such via the usual platform UX flows.
- They self self-report as being on the "beta" and "dev" channels in
  user metrics ...