In Local predictor continue prerender check, record # of URLs examined
that were not filtered.

R=dougw@chromium.org

Review URL: https://codereview.chromium.org/29463004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229473 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229473