Those instructions are a bit out of date for how the Chromoting host currently works - there are some cases where it uses a new authentication model, which will require a different set of keys.
For Chromoting, you will need to create two sets of keys:
* an "Installed Application - Other" key (GOOGLE_CLIENT_ID_REMOTING_HOST, GOOGLE_CLIENT_SECRET_REMOTING_HOST), which is what the host uses when running with the new authentication model.
There is no way to pass both of these via the gyp include at the same time (it only allows you to pass a single key for everything), so I think the easiest way to set them in your personal build would be to remove the overrides from
~/.gyp/include.gypi and update the #defines in
google_api/google_api_keys.cc directly.
(I apologize that this is currently a bit clunky right now - we're in the middle of some transitions for how we do auth and host registration, we expect that to be significantly cleaner once we're done)