How can I make Emacs Org-mode open links to sites in Google Chrome?

As Trey suggests, you can set it to a generic browser, but instead of "chromium-browser" use "google-chrome", like this:

(setq browse-url-browser-function 'browse-url-generic
      browse-url-generic-program "google-chrome")

That worked for me with Emacs 23.2 and Chrome 12.

Emacs 23.2 doesn't directly support Google Chrome, but it does support a "generic" browser, and something like this should work:

(setq browse-url-browser-function 'browse-url-generic
      browse-url-generic-program "chromium-browser")

You don't mention your OS, but if it's Windows or Mac, you can try:

(setq browse-url-browser-function 'browse-url-default-windows-browser)
(setq browse-url-browser-function 'browse-url-default-macosx-browser)

And, if that doesn't work, there are other folks who have implemented 'browse-url-chrome. Google turned up the following link:

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