By Alastair Sharp and Euan Rocha TORONTO (Reuters) – Canadas Competition Bureau has filed a legal motion against Google Inc alleging that the company is abusing its dominant position in online search, joining U.S. and European anti-trust authorities in challenging the practices of the web giant. The bureau commissioner, in a federal court filing dated December 11., is seeking an order requiring Google hand over information about its business practices, including contracts. A spokeswoman for the Competition Bureau said the decision to seek the order was based on the fact that Google has, or is likely to have, information relevant to the bureaus probe of the companys practices. Google did not immediately respond to a request for comment.