Comment 11 for bug 513133

Actually, it's not just developers who would want to set a non-packaged version of Chromium as the default browser. There also exist users who likes bleeding edge software and download chrome-linux.zip from Chromium's continuous build system.

Right now, one can just unzip chrome-linux.zip, run chrome-wrapper, and have the latest copy of Chromium and be able to set that as the default browser. This change will break that and make bleeding edge Chromium users set PATH to point to chrome-wrapper for it to work.