Load a web page prior to calling key events on it.

 Bug 6451055
 WebViewClassic does not handle key events before it is
 initialized. Loading a web page and waiting for it to
 complete ensures that WebViewClassic is initialized. It
 also makes sense that a page is loaded before testing
 for unhandled key events.

Change-Id: Ibfd92560eacb638d0a012df5d513c6d45175629a