diff --git content/browser/renderer_host/browser_compositor_view_mac.h content/browser/renderer_host/browser_compositor_view_mac.h
index 552a56b..2a817d8 100644
--- content/browser/renderer_host/browser_compositor_view_mac.h
+++ content/browser/renderer_host/browser_compositor_view_mac.h
@@ -52,6 +52,7 @@ class BrowserCompositorMac {
 
   // This may return nullptr, if this has detached itself from its
   // ui::Compositor.
+  ui::Compositor* GetCompositor();
   ui::AcceleratedWidgetMac* GetAcceleratedWidgetMac();
 
   void SwapCompositorFrame(uint32_t output_surface_id,
diff --git content/browser/renderer_host/browser_compositor_view_mac.mm content/browser/renderer_host/browser_compositor_view_mac.mm
index e9faa0a..931a92f 100644
--- content/browser/renderer_host/browser_compositor_view_mac.mm
+++ content/browser/renderer_host/browser_compositor_view_mac.mm
@@ -186,6 +186,12 @@ void BrowserCompositorMac::Destroy() {
     g_spare_recyclable_compositor.Get().reset();
 }
 
+ui::Compositor* BrowserCompositorMac::GetCompositor() {
+  if (recyclable_compositor_)
+    return recyclable_compositor_->compositor();
+  return nullptr;
+}
+
 ui::AcceleratedWidgetMac* BrowserCompositorMac::GetAcceleratedWidgetMac() {
   if (recyclable_compositor_)
     return recyclable_compositor_->accelerated_widget_mac();