“Instead of looking for Google and looking for search, the omnibox gives them immediate access to Google search,” Patrick Pichette, Google’s chief financial officer, said in a conference call with analysts last month. “On a tactical basis, everybody that uses Chrome is a guaranteed locked-in user for us in terms of having access to Google,” he said during that call. Google later said that Mr. Pichette misspoke and that Chrome users were not “locked in” because they could easily visit other search engines or change the default search engine.