Small typo fixes.

Change-Id: I4aca4e02e06700738337d92ebfc18995184a31f6
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Remove unused overload of newCallContext()

Change-Id: I9b9de585b18bf87ea256db36b320a7defdcc4ac8
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>