The class inherited QSharedData, had a non-virtual clone() function and
a non-virtual operator==() which compared QPlatformPrintDevice::id().
Derived classes implemented clone() and operator==() comparing ids
to no effect. The class does not have any setters modifying its values,
so detaching, copying and assigning does not make sense.
Remove the inheritance, clone(), and operator==() and make the class
a non-copyable base class. Use a QSharedPointer instead of
a QSharedDataPointer to store it in QPrintDevice.
Remove copy constructors and clone() reimplementations that were never
called in implementations.
Found while investigating QTBUG-44991.
Task-number: QTBUG-44991
Change-Id: Ib79354b37048d04d50d936f1d0ae06c36efaac00
Reviewed-by: Morten Johan Sørvig <morten.sorvig@theqtcompany.com>
Reviewed-by: Paul Olav Tvete <paul.tvete@theqtcompany.com>
a6bcdf1516