sudo dpkg -i google-chrome-beta_current_amd64.deb
Selecting previously deselected package google-chrome-beta.
dpkg: regarding google-chrome-beta_current_amd64.deb containing google-chrome-beta:
 google-chrome-beta conflicts with google-chrome
  google-chrome-stable provides google-chrome and is present and installed.
dpkg: error processing google-chrome-beta_current_amd64.deb (--install):
 conflicting packages - not installing google-chrome-beta
Errors were encountered while processing:
 google-chrome-beta_current_amd64.deb

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sudo aptitude remove google-chrome
No packages will be installed, upgraded, or removed.
0 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B of archives. After unpacking 0 B will be used.