These issues were raised by Sze Howe Koh in code review 89965 of
change I259c204e. This change set does not yet include any comparison
to the old Qt WebKit bridging functionality. I'll hand this in later.

Change-Id: Idc7df0e02bfcda3c3fcf1a4e147c1dfac4f18a64
Reviewed-by: Sze Howe Koh <szehowe.koh@gmail.com>