diff --git content/browser/renderer_host/browser_compositor_view_mac.h content/browser/renderer_host/browser_compositor_view_mac.h
index dad7599ed999..c8daf2ba58c8 100644
--- content/browser/renderer_host/browser_compositor_view_mac.h
+++ content/browser/renderer_host/browser_compositor_view_mac.h
@@ -52,11 +52,13 @@ class CONTENT_EXPORT BrowserCompositorMac : public DelegatedFrameHostClient {
 
   // These will not return nullptr until Destroy is called.
   DelegatedFrameHost* GetDelegatedFrameHost();
+  ui::Layer* GetRootLayer() { return root_layer_.get(); }
 
   // Ensure that the currect compositor frame be cleared (even if it is
   // potentially visible).
   void ClearCompositorFrame();
 
+  ui::Compositor* GetCompositor();
   gfx::AcceleratedWidget GetAcceleratedWidget();
   void DidCreateNewRendererCompositorFrameSink(
       viz::mojom::CompositorFrameSinkClient* renderer_compositor_frame_sink);
diff --git content/browser/renderer_host/browser_compositor_view_mac.mm content/browser/renderer_host/browser_compositor_view_mac.mm
index 07d42e680951..46699b959d2d 100644
--- content/browser/renderer_host/browser_compositor_view_mac.mm
+++ content/browser/renderer_host/browser_compositor_view_mac.mm
@@ -215,6 +215,12 @@ void OnCompositingShuttingDown(ui::Compositor* compositor) override {}
     g_spare_recyclable_compositors.Get().clear();
 }
 
+ui::Compositor* BrowserCompositorMac::GetCompositor() {
+  if (recyclable_compositor_)
+    return recyclable_compositor_->compositor();
+  return nullptr;
+}
+
 gfx::AcceleratedWidget BrowserCompositorMac::GetAcceleratedWidget() {
   if (recyclable_compositor_) {
     return recyclable_compositor_->accelerated_widget_mac()
@@ -268,7 +274,9 @@ void OnCompositingShuttingDown(ui::Compositor* compositor) override {}
       accelerated_widget_mac_ns_view_->AcceleratedWidgetGetNSView();
   display::Display new_display =
       display::Screen::GetScreen()->GetDisplayNearestView(ns_view);
-  gfx::Size new_size_dip([ns_view bounds].size);
+  // TODO(cef): Get display info from callbacks. |ns_view| will be nullptr.
+  gfx::Size new_size_dip(ns_view ? gfx::Size([ns_view bounds].size) :
+                                   root_layer_->bounds().size());
   if (new_size_dip == dfh_size_dip_ && new_display == dfh_display_)
     return false;
 
diff --git ui/accelerated_widget_mac/accelerated_widget_mac.mm ui/accelerated_widget_mac/accelerated_widget_mac.mm
index 8306398431d9..5ab4fef9ac0f 100644
--- ui/accelerated_widget_mac/accelerated_widget_mac.mm
+++ ui/accelerated_widget_mac/accelerated_widget_mac.mm
@@ -71,6 +71,10 @@ - (void)setContentsChanged;
   DCHECK(view && !view_);
   view_ = view;
 
+  // Will be nullptr for CEF.
+  if (!view_->AcceleratedWidgetGetNSView())
+    return;
+
   CALayer* background_layer = [view_->AcceleratedWidgetGetNSView() layer];
   DCHECK(background_layer);
   [flipped_layer_ setBounds:[background_layer bounds]];