Add QPlatformWindow::windowFrameGeometry()

Convenience accessor for use by the Wayland
platform plugin.

Change-Id: I420209138cfc285f8396913548b9e158a35ee9c1
Reviewed-by: Paul Olav Tvete <paul.tvete@theqtcompany.com>

src/gui/kernel/qplatformwindow.cpp

@@ -689,6 +689,14 @@ QRect QPlatformWindow::windowGeometry() const
     return QHighDpi::toNativePixels(window()->geometry(), window());
 }
 
+/*!
+    Returns the QWindow frame geometry.
+*/
+QRect QPlatformWindow::windowFrameGeometry() const
+{
+    return QHighDpi::toNativePixels(window()->frameGeometry(), window());
+}
+
 /*!
     Returns the closest acceptable geometry for a given geometry before
     a resize/move event for platforms that support it, for example to

src/gui/kernel/qplatformwindow.h

@@ -138,6 +138,7 @@ public:
     QSize windowBaseSize() const;
     QSize windowSizeIncrement() const;
     QRect windowGeometry() const;
+    QRect windowFrameGeometry() const;
     QRectF windowClosestAcceptableGeometry(const QRectF &nativeRect) const;
 
 protected: