De-inline dtors of QAbstractEventDispatcherPrivate subclasses

... pinning the vtables to a single TU each, instead of duplicating
them for every user.

Task-number: QTBUG-45582
Change-Id: I3b7bce14567dc8be89795a48f6871eb24fe908aa
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Lena Biliaieva <lena.biliaieva@qt.io>
(cherry picked from commit 2e2f5093912faf612f0be72289180b167d6326a7)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

src/corelib/kernel/qeventdispatcher_glib.cpp

@@ -322,6 +322,9 @@ QEventDispatcherGlibPrivate::QEventDispatcherGlibPrivate(GMainContext *context)
     g_source_attach(&idleTimerSource->source, mainContext);
 }
 
+QEventDispatcherGlibPrivate::~QEventDispatcherGlibPrivate()
+    = default;
+
 void QEventDispatcherGlibPrivate::runTimersOnceWithNormalPriority()
 {
     timerSource->runWithIdlePriority = false;

src/corelib/kernel/qeventdispatcher_glib_p.h

@@ -65,6 +65,8 @@ class Q_CORE_EXPORT QEventDispatcherGlibPrivate : public QAbstractEventDispatche
 
 public:
     QEventDispatcherGlibPrivate(GMainContext *context = nullptr);
+    ~QEventDispatcherGlibPrivate() override;
+
     GMainContext *mainContext;
     GPostEventSource *postEventSource;
     GSocketNotifierSource *socketNotifierSource;

src/gui/platform/unix/qeventdispatcher_glib.cpp

@@ -63,6 +63,8 @@ QPAEventDispatcherGlibPrivate::QPAEventDispatcherGlibPrivate(GMainContext *conte
     g_source_attach(&userEventSource->source, mainContext);
 }
 
+QPAEventDispatcherGlibPrivate::~QPAEventDispatcherGlibPrivate()
+    = default;
 
 QPAEventDispatcherGlib::QPAEventDispatcherGlib(QObject *parent)
     : QEventDispatcherGlib(*new QPAEventDispatcherGlibPrivate, parent)

src/gui/platform/unix/qeventdispatcher_glib_p.h

@@ -43,6 +43,8 @@ class QPAEventDispatcherGlibPrivate : public QEventDispatcherGlibPrivate
     Q_DECLARE_PUBLIC(QPAEventDispatcherGlib)
 public:
     QPAEventDispatcherGlibPrivate(GMainContext *context = nullptr);
+    ~QPAEventDispatcherGlibPrivate() override;
+
     GUserEventSource *userEventSource;
 };
 

src/plugins/platforms/cocoa/qcocoaeventdispatcher.h

@@ -110,6 +110,7 @@ class QCocoaEventDispatcherPrivate : public QAbstractEventDispatcherPrivate
 
 public:
     QCocoaEventDispatcherPrivate();
+    ~QCocoaEventDispatcherPrivate() override;
 
     uint processEventsFlags;
 

src/plugins/platforms/cocoa/qcocoaeventdispatcher.mm

@@ -796,6 +796,9 @@ QCocoaEventDispatcherPrivate::QCocoaEventDispatcherPrivate()
 {
 }
 
+QCocoaEventDispatcherPrivate::~QCocoaEventDispatcherPrivate()
+    = default;
+
 void qt_mac_maybeCancelWaitForMoreEventsForwarder(QAbstractEventDispatcher *eventDispatcher)
 {
     static_cast<QCocoaEventDispatcher *>(eventDispatcher)->d_func()->maybeCancelWaitForMoreEvents();