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>

2 files changed, 0 insertions, 5 deletions

diff --git a/examples/webengine/minimal/doc/src/minimal.qdoc b/examples/webengine/minimal/doc/src/minimal.qdoc
index 4fc62bddb..1e629f689 100644
--- a/examples/webengine/minimal/doc/src/minimal.qdoc
+++ b/examples/webengine/minimal/doc/src/minimal.qdoc
@@ -56,10 +56,6 @@
     \l{WebEngineProfile::cachePath} and
     \l{WebEngineProfile::persistentStoragePath}).
 
-    We also set the Qt::AA_EnableHighDpiScaling attribute. This lets the web
-    view automatically scale on high-dpi displays. Then we instantiate a
-    QGuiApplication object.
-
     Next, we call \l{QtWebEngine::initialize}, which makes sure that OpenGL
     contexts can be shared between the main process and the dedicated renderer
     process (\c QtWebEngineProcess). This method needs to be called before
diff --git a/examples/webengine/minimal/main.cpp b/examples/webengine/minimal/main.cpp
index 86109f97a..fde716451 100644
--- a/examples/webengine/minimal/main.cpp
+++ b/examples/webengine/minimal/main.cpp
@@ -55,7 +55,6 @@
 int main(int argc, char *argv[])
 {
     QCoreApplication::setOrganizationName("QtExamples");
-    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
     QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts);
     QtWebEngine::initialize();
     QGuiApplication app(argc, argv);