Bug 1667116 - Request to stay unredirected on WR/OGL, too. r=stransky

Until bug 1617002 Firefox would unintendedly not get unredirected on X11
when used with WR and OpenGL as it didn't fullfill the requirements -
not being transparent.

Now that this is fixed, fullscreen unredirection can happen on certain
compositors. For the basic compositor we already explicitely ask to not
get unredirected - do that for all backends.

Differential Revision: https://phabricator.services.mozilla.com/D92180

widget/gtk/nsWindow.cpp

@@ -7959,9 +7959,10 @@ void nsWindow::SetProgress(unsigned long progressPercent) {
 
 #ifdef MOZ_X11
 void nsWindow::SetCompositorHint(WindowComposeRequest aState) {
-  if (mIsX11Display &&
-      (!GetLayerManager() ||
-       GetLayerManager()->GetBackendType() == LayersBackend::LAYERS_BASIC)) {
+  if (!mIsX11Display) {
+    return;
+  }
+
   gulong value = aState;
   GdkAtom cardinal_atom = gdk_x11_xatom_to_atom(XA_CARDINAL);
   gdk_property_change(gtk_widget_get_window(mShell),
@@ -7970,7 +7971,6 @@ void nsWindow::SetCompositorHint(WindowComposeRequest aState) {
                       32,  // format
                       GDK_PROP_MODE_REPLACE, (guchar*)&value, 1);
 }
-}
 #endif
 
 nsresult nsWindow::SetSystemFont(const nsCString& aFontName) {