diff --git a/layout/base/nsDisplayList.cpp b/layout/base/nsDisplayList.cpp
index e27dab52f17a..5335a760f0c9 100644
--- a/layout/base/nsDisplayList.cpp
+++ b/layout/base/nsDisplayList.cpp
@@ -1278,23 +1278,17 @@ nsDisplayList::ComputeVisibilityForSublist(nsDisplayListBuilder* aBuilder,
   return anyVisible;
 }
 
-void nsDisplayList::PaintRoot(nsDisplayListBuilder* aBuilder,
-                              nsRenderingContext* aCtx,
-                              uint32_t aFlags) {
-  PROFILER_LABEL("nsDisplayList", "PaintRoot",
-    js::ProfileEntry::Category::GRAPHICS);
-  PaintForFrame(aBuilder, aCtx, aBuilder->RootReferenceFrame(), aFlags);
-}
-
 /**
  * We paint by executing a layer manager transaction, constructing a
  * single layer representing the display list, and then making it the
  * root of the layer manager, drawing into the PaintedLayers.
  */
-void nsDisplayList::PaintForFrame(nsDisplayListBuilder* aBuilder,
-                                  nsRenderingContext* aCtx,
-                                  nsIFrame* aForFrame,
-                                  uint32_t aFlags) {
+void nsDisplayList::PaintRoot(nsDisplayListBuilder* aBuilder,
+                              nsRenderingContext* aCtx,
+                              uint32_t aFlags) {
+  PROFILER_LABEL("nsDisplayList", "PaintRoot",
+    js::ProfileEntry::Category::GRAPHICS);
+
   nsRefPtr<LayerManager> layerManager;
   bool widgetTransaction = false;
   bool allowRetaining = false;
@@ -1347,7 +1341,8 @@ void nsDisplayList::PaintForFrame(nsDisplayListBuilder* aBuilder,
     layerBuilder->DidBeginRetainedLayerTransaction(layerManager);
   }
 
-  nsPresContext* presContext = aForFrame->PresContext();
+  nsIFrame* frame = aBuilder->RootReferenceFrame();
+  nsPresContext* presContext = frame->PresContext();
   nsIPresShell* presShell = presContext->GetPresShell();
 
   NotifySubDocInvalidationFunc computeInvalidFunc =
@@ -1364,7 +1359,7 @@ void nsDisplayList::PaintForFrame(nsDisplayListBuilder* aBuilder,
   ContainerLayerParameters containerParameters
     (presShell->GetXResolution(), presShell->GetYResolution());
   nsRefPtr<ContainerLayer> root = layerBuilder->
-    BuildContainerLayerFor(aBuilder, layerManager, aForFrame, nullptr, this,
+    BuildContainerLayerFor(aBuilder, layerManager, frame, nullptr, this,
                            containerParameters, nullptr);
 
   nsIDocument* document = nullptr;
@@ -1384,11 +1379,11 @@ void nsDisplayList::PaintForFrame(nsDisplayListBuilder* aBuilder,
 
   nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame();
 
-  nsRect viewport(aBuilder->ToReferenceFrame(aForFrame), aForFrame->GetSize());
+  nsRect viewport(aBuilder->ToReferenceFrame(frame), frame->GetSize());
 
   root->SetFrameMetrics(
-    nsDisplayScrollLayer::ComputeFrameMetrics(aForFrame, rootScrollFrame,
-                       aBuilder->FindReferenceFrameFor(aForFrame),
+    nsDisplayScrollLayer::ComputeFrameMetrics(frame, rootScrollFrame,
+                       aBuilder->FindReferenceFrameFor(frame),
                        root, FrameMetrics::NULL_SCROLL_ID, viewport,
                        !isRoot, isRoot, containerParameters));
 
@@ -1418,7 +1413,7 @@ void nsDisplayList::PaintForFrame(nsDisplayListBuilder* aBuilder,
       // but they still need the invalidation state bits cleared in order for
       // invalidation for CSS/SMIL animation to work properly.
       (document && document->IsBeingUsedAsImage())) {
-    aForFrame->ClearInvalidationStateBits();
+    frame->ClearInvalidationStateBits();
   }
 
   bool temp = aBuilder->SetIsCompositingCheap(layerManager->IsCompositingCheap());
diff --git a/layout/base/nsDisplayList.h b/layout/base/nsDisplayList.h
index 4439d06fe9a2..e6496da4d64a 100644
--- a/layout/base/nsDisplayList.h
+++ b/layout/base/nsDisplayList.h
@@ -1672,12 +1672,6 @@ public:
   };
   void PaintRoot(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx,
                  uint32_t aFlags);
-  /**
-   * Like PaintRoot, but used for internal display sublists.
-   * aForFrame is the frame that the list is associated with.
-   */
-  void PaintForFrame(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx,
-                     nsIFrame* aForFrame, uint32_t aFlags);
   /**
    * Get the bounds. Takes the union of the bounds of all children.
    * The result is not cached.