Add CefRequestHandler::OnCertificateError() callback (issue #345).

git-svn-id: http://chromiumembedded.googlecode.com/svn/trunk/cef3@1176 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
Add support for the V8 LoadTimes extension (issue #917).

git-svn-id: http://chromiumembedded.googlecode.com/svn/trunk/cef3@1177 5089003a-bbd8-11dd-ad1f-f1f9622dbc98