Bug 1761995 - Skip content-visibility: hidden content in display lists r=emilio

Differential Revision: https://phabricator.services.mozilla.com/D142341

layout/generic/nsImageFrame.cpp

@@ -2288,6 +2288,12 @@ void nsImageFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
 
   DisplayBorderBackgroundOutline(aBuilder, aLists);
 
+  if (IsContentHidden()) {
+    DisplaySelectionOverlay(aBuilder, aLists.Content(),
+                            nsISelectionDisplay::DISPLAY_IMAGES);
+    return;
+  }
+
   uint32_t clipFlags =
       nsStyleUtil::ObjectPropsMightCauseOverflow(StylePosition())
           ? 0