Fix some compiler warnings

- Remove deprecated Qt::AA_EnableHighDpiScaling and Qt::AA_UseHighDpiPixmaps
  from examples. High-DPI scaling is always enabled.
- Reorder initialization of members of QWebEngineDownloadRequestPrivate.
  Also remove m_ prefix from public members' name.
- Remove unused parameters from methods of DummyDelegate.
- Add missing overrides in auto tests.

Pick-to: 6.2
Change-Id: I18d6973b8bee574b37b73fbaaa8d57002ac8ba2d
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

1 files changed, 0 insertions, 1 deletions

diff --git a/examples/webenginewidgets/stylesheetbrowser/main.cpp b/examples/webenginewidgets/stylesheetbrowser/main.cpp
index 9cd294d48..571fccb11 100644
--- a/examples/webenginewidgets/stylesheetbrowser/main.cpp
+++ b/examples/webenginewidgets/stylesheetbrowser/main.cpp
@@ -58,7 +58,6 @@ int main(int argc, char *argv[])
     qRegisterMetaType<StyleSheet>("StyleSheet");
 
     QCoreApplication::setOrganizationName("QtExamples");
-    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
     QApplication a(argc, argv);
     MainWindow w(QUrl("http://qt.io"));
     w.show();