diff --git a/layout/base/FrameLayerBuilder.h b/layout/base/FrameLayerBuilder.h
index 2a1da5cc2daf..9f8e395c894b 100644
--- a/layout/base/FrameLayerBuilder.h
+++ b/layout/base/FrameLayerBuilder.h
@@ -61,7 +61,6 @@ struct ContainerLayerParameters {
     , mInActiveTransformedSubtree(false)
     , mDisableSubpixelAntialiasingInDescendants(false)
     , mInLowPrecisionDisplayPort(false)
-    , mForEventsOnly(false)
   {}
   ContainerLayerParameters(float aXScale, float aYScale)
     : mXScale(aXScale)
@@ -72,7 +71,6 @@ struct ContainerLayerParameters {
     , mInActiveTransformedSubtree(false)
     , mDisableSubpixelAntialiasingInDescendants(false)
     , mInLowPrecisionDisplayPort(false)
-    , mForEventsOnly(false)
   {}
   ContainerLayerParameters(float aXScale, float aYScale,
                            const nsIntPoint& aOffset,
@@ -86,7 +84,6 @@ struct ContainerLayerParameters {
     , mInActiveTransformedSubtree(aParent.mInActiveTransformedSubtree)
     , mDisableSubpixelAntialiasingInDescendants(aParent.mDisableSubpixelAntialiasingInDescendants)
     , mInLowPrecisionDisplayPort(aParent.mInLowPrecisionDisplayPort)
-    , mForEventsOnly(aParent.mForEventsOnly)
   {}
 
   float mXScale, mYScale;
@@ -115,7 +112,6 @@ struct ContainerLayerParameters {
   bool mInActiveTransformedSubtree;
   bool mDisableSubpixelAntialiasingInDescendants;
   bool mInLowPrecisionDisplayPort;
-  bool mForEventsOnly;
   /**
    * When this is false, PaintedLayer coordinates are drawn to with an integer
    * translation and the scale in mXScale/mYScale.
diff --git a/layout/base/nsDisplayList.cpp b/layout/base/nsDisplayList.cpp
index 4f48ff4a89b8..11dcbef8b439 100644
--- a/layout/base/nsDisplayList.cpp
+++ b/layout/base/nsDisplayList.cpp
@@ -3932,11 +3932,9 @@ already_AddRefed<Layer>
 nsDisplayOpacity::BuildLayer(nsDisplayListBuilder* aBuilder,
                              LayerManager* aManager,
                              const ContainerLayerParameters& aContainerParameters) {
-  ContainerLayerParameters params = aContainerParameters;
-  params.mForEventsOnly = mForEventsOnly;
   RefPtr<Layer> container = aManager->GetLayerBuilder()->
     BuildContainerLayerFor(aBuilder, aManager, mFrame, this, &mList,
-                           params, nullptr,
+                           aContainerParameters, nullptr,
                            FrameLayerBuilder::CONTAINER_ALLOW_PULL_BACKGROUND_COLOR);
   if (!container)
     return nullptr;
diff --git a/layout/ipc/RenderFrameParent.cpp b/layout/ipc/RenderFrameParent.cpp
index 4f1b07faa1e8..7f38a395e3db 100644
--- a/layout/ipc/RenderFrameParent.cpp
+++ b/layout/ipc/RenderFrameParent.cpp
@@ -388,9 +388,7 @@ RenderFrameParent::BuildLayer(nsDisplayListBuilder* aBuilder,
     // draw a manager's subtree.  The latter is bad bad bad, but the the
     // MOZ_ASSERT() above will flag it.  Returning nullptr here will just
     // cause the shadow subtree not to be rendered.
-    if (!aContainerParameters.mForEventsOnly) {
-      NS_WARNING("Remote iframe not rendered");
-    }
+    NS_WARNING("Remote iframe not rendered");
     return nullptr;
   }