Bug 478101. Suppres GetUsed* assertions during all display list processing, not just during display list construction. r+sr=roc

layout/base/nsLayoutUtils.cpp

@@ -1071,16 +1071,15 @@ nsresult
 nsLayoutUtils::PaintFrame(nsIRenderingContext* aRenderingContext, nsIFrame* aFrame,
                           const nsRegion& aDirtyRegion, nscolor aBackground)
 {
+  nsAutoDisableGetUsedXAssertions disableAssert;
+
   nsDisplayListBuilder builder(aFrame, PR_FALSE, PR_TRUE);
   nsDisplayList list;
   nsRect dirtyRect = aDirtyRegion.GetBounds();
 
   builder.EnterPresShell(aFrame, dirtyRect);
 
-  nsresult rv;
-  {
-    nsAutoDisableGetUsedXAssertions disableAssert;
-    rv =
+  nsresult rv =
     aFrame->BuildDisplayListForStackingContext(&builder, dirtyRect, &list);
     
   if (NS_SUCCEEDED(rv) && aFrame->GetType() == nsGkAtoms::pageContentFrame) {
@@ -1100,7 +1099,6 @@ nsLayoutUtils::PaintFrame(nsIRenderingContext* aRenderingContext, nsIFrame* aFra
       y += page->GetSize().height;
     }
   }
-  }
 
   builder.LeavePresShell(aFrame, dirtyRect);
   NS_ENSURE_SUCCESS(rv, rv);