Discount previous title when checking newly-loaded title.

 Bug 6400819
 The title is changed asynchronously from the rest of the
 page load. This change discounts the previous title
 so that it has a chance to change to the new title before
 exiting the title check polling.

Change-Id: Ia7a9e4b685457e48d8a30b1e0254b39a82075867
1 file changed