Merge remote-tracking branch 'origin/redwood' into release

1 files changed, 13 insertions, 7 deletions

diff --git a/layout/generic/nsPageFrame.cpp b/layout/generic/nsPageFrame.cpp
index ae3af6ef7..31a686e83 100644
--- a/layout/generic/nsPageFrame.cpp
+++ b/layout/generic/nsPageFrame.cpp
@@ -437,7 +437,7 @@ PruneDisplayListForExtraPage(nsDisplayListBuilder* aBuilder,
 static void
 BuildDisplayListForExtraPage(nsDisplayListBuilder* aBuilder,
                              nsPageFrame* aPage, nsIFrame* aExtraPage,
-                             const nsRect& aDirtyRect, nsDisplayList* aList)
+                             nsDisplayList* aList)
 {
   // The only content in aExtraPage we care about is out-of-flow content whose
   // placeholders have occurred in aPage. If
@@ -447,7 +447,7 @@ BuildDisplayListForExtraPage(nsDisplayListBuilder* aBuilder,
     return;
   }
   nsDisplayList list;
-  aExtraPage->BuildDisplayListForStackingContext(aBuilder, aDirtyRect, &list);
+  aExtraPage->BuildDisplayListForStackingContext(aBuilder, &list);
   PruneDisplayListForExtraPage(aBuilder, aPage, aExtraPage, &list);
   aList->AppendToTop(&list);
 }
@@ -517,10 +517,9 @@ protected:
 //------------------------------------------------------------------------------
 void
 nsPageFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
-                              const nsRect&           aDirtyRect,
                               const nsDisplayListSet& aLists)
 {
-  nsDisplayListCollection set;
+  nsDisplayListCollection set(aBuilder);
 
   if (PresContext()->IsScreen()) {
     DisplayBorderBackgroundOutline(aBuilder, aLists);
@@ -558,7 +557,10 @@ nsPageFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
     clipState.ClipContainingBlockDescendants(clipRect, nullptr);
 
     nsRect dirtyRect = child->GetVisualOverflowRectRelativeToSelf();
-    child->BuildDisplayListForStackingContext(aBuilder, dirtyRect, &content);
+    nsDisplayListBuilder::AutoBuildingDisplayList
+    buildingForChild(aBuilder, child, dirtyRect,
+                     aBuilder->IsAtRootOfPseudoStackingContext());
+    child->BuildDisplayListForStackingContext(aBuilder, &content);
 
     // We may need to paint out-of-flow frames whose placeholders are
     // on other pages. Add those pages to our display list. Note that
@@ -569,8 +571,12 @@ nsPageFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
     // following placeholders to their out-of-flows) end up on the list.
     nsIFrame* page = child;
     while ((page = GetNextPage(page)) != nullptr) {
-      BuildDisplayListForExtraPage(aBuilder, this, page,
-          dirtyRect + child->GetOffsetTo(page), &content);
+     nsRect childDirty = dirtyRect + child->GetOffsetTo(page);
+
+    nsDisplayListBuilder::AutoBuildingDisplayList
+      buildingForChild(aBuilder, page, childDirty,
+                       aBuilder->IsAtRootOfPseudoStackingContext());
+      BuildDisplayListForExtraPage(aBuilder, this, page, &content);
     }
 
     // Invoke AutoBuildingDisplayList to ensure that the correct dirtyRect