We should handle all four cases when strip the "client".
We were incorrect in the third case.

http://www.google.com/m?client=ms-unknown
http://www.google.com/m?hl=en&client=ms-unknown
http://www.google.com/m?client=ms-unknown&q=pizza
http://www.google.com/m?hl=en&client=ms-unknown&q=pizza

Fix http://b/issue?id=2174396
1 file changed