diff --git components/input/fling_scheduler_base.h components/input/fling_scheduler_base.h
index 76057b3e50f78..d3b63a3b07805 100644
--- components/input/fling_scheduler_base.h
+++ components/input/fling_scheduler_base.h
@@ -5,14 +5,26 @@
 #ifndef COMPONENTS_INPUT_FLING_SCHEDULER_BASE_H_
 #define COMPONENTS_INPUT_FLING_SCHEDULER_BASE_H_
 
+#include "base/memory/raw_ptr.h"
 #include "components/input/fling_controller.h"
 
+namespace ui {
+class Compositor;
+}
+
 namespace input {
 
 class FlingSchedulerBase : public FlingControllerSchedulerClient {
  public:
   virtual void ProgressFlingOnBeginFrameIfneeded(
       base::TimeTicks current_time) = 0;
+  
+  void SetCompositor(ui::Compositor* compositor) {
+    compositor_ = compositor;
+  }
+
+ protected:
+  raw_ptr<ui::Compositor> compositor_ = nullptr;
 };
 
 }  // namespace input
diff --git components/input/render_input_router.h components/input/render_input_router.h
index d5c125e621004..cd1177744e1a8 100644
--- components/input/render_input_router.h
+++ components/input/render_input_router.h
@@ -67,6 +67,7 @@ class COMPONENT_EXPORT(INPUT) RenderInputRouter
 
   InputRouter* input_router() { return input_router_.get(); }
   RenderInputRouterDelegate* delegate() { return delegate_; }
+  input::FlingSchedulerBase* fling_scheduler() { return fling_scheduler_.get(); }
 
   void SetForceEnableZoom(bool);
   void SetDeviceScaleFactor(float device_scale_factor);
diff --git content/browser/renderer_host/input/fling_scheduler.cc content/browser/renderer_host/input/fling_scheduler.cc
index f1030a744809c..c222a209949e6 100644
--- content/browser/renderer_host/input/fling_scheduler.cc
+++ content/browser/renderer_host/input/fling_scheduler.cc
@@ -98,6 +98,9 @@ void FlingScheduler::ProgressFlingOnBeginFrameIfneeded(
 }
 
 ui::Compositor* FlingScheduler::GetCompositor() {
+  if (compositor_) {
+    return compositor_;
+  }
   if (!host_->GetView()) {
     return nullptr;
   }
diff --git content/browser/renderer_host/render_widget_host_impl.cc content/browser/renderer_host/render_widget_host_impl.cc
index 5a521aa5a6117..47433d6fb0841 100644
--- content/browser/renderer_host/render_widget_host_impl.cc
+++ content/browser/renderer_host/render_widget_host_impl.cc
@@ -791,7 +791,7 @@ void RenderWidgetHostImpl::WasHidden() {
 
   // Cancel pending pointer lock requests, unless there's an open user prompt.
   // Prompts should remain open and functional across tab switches.
-  if (!delegate_->IsWaitingForPointerLockPrompt(this)) {
+  if (!delegate_ || !delegate_->IsWaitingForPointerLockPrompt(this)) {
     RejectPointerLockOrUnlockIfNecessary(
         blink::mojom::PointerLockResult::kWrongDocument);
   }
@@ -3232,6 +3232,11 @@ void RenderWidgetHostImpl::DecrementInFlightEventCount(
   }
 }
 
+void RenderWidgetHostImpl::SetCompositorForFlingScheduler(
+    ui::Compositor* compositor) {
+  GetRenderInputRouter()->fling_scheduler()->SetCompositor(compositor);
+}
+
 void RenderWidgetHostImpl::AddPendingUserActivation(
     const WebInputEvent& event) {
   if ((base::FeatureList::IsEnabled(
diff --git content/browser/renderer_host/render_widget_host_impl.h content/browser/renderer_host/render_widget_host_impl.h
index b8dadc4cca462..f5bbd83de86ab 100644
--- content/browser/renderer_host/render_widget_host_impl.h
+++ content/browser/renderer_host/render_widget_host_impl.h
@@ -836,6 +836,7 @@ class CONTENT_EXPORT RenderWidgetHostImpl
 
   void ProgressFlingIfNeeded(base::TimeTicks current_time);
   void StopFling();
+  void SetCompositorForFlingScheduler(ui::Compositor* compositor);
 
   RenderWidgetHostViewBase* GetRenderWidgetHostViewBase();