diff --git a/widget/headless/HeadlessWidget.cpp b/widget/headless/HeadlessWidget.cpp
index 4ec468cecf28..c1fbcccc93d9 100644
--- a/widget/headless/HeadlessWidget.cpp
+++ b/widget/headless/HeadlessWidget.cpp
@@ -12,7 +12,6 @@
 #include "mozilla/ClearOnShutdown.h"
 #include "mozilla/Maybe.h"
 #include "mozilla/NativeKeyBindingsType.h"
-#include "mozilla/StaticPrefs_apz.h"
 #include "mozilla/TextEventDispatcher.h"
 #include "mozilla/TextEvents.h"
 #include "mozilla/WritingModes.h"
@@ -546,14 +545,13 @@ nsresult HeadlessWidget::SynthesizeNativeTouchPadPinch(
       return NS_ERROR_INVALID_ARG;
   }
 
-  ScreenPoint touchpadPoint = ViewAs<ScreenPixel>(
-      aPoint - WidgetToScreenOffset(),
-      PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent);
+  LayoutDeviceIntPoint touchpadPoint = aPoint - WidgetToScreenOffset();
   // The headless widget does not support modifiers.
   // Do not pass `aModifierFlags` because it contains native modifier values.
   PinchGestureInput inputToDispatch(
       pinchGestureType, PinchGestureInput::TRACKPAD, PR_IntervalNow(),
-      TimeStamp::Now(), ExternalPoint(0, 0), touchpadPoint,
+      TimeStamp::Now(), ExternalPoint(0, 0),
+      ScreenPoint(touchpadPoint.x, touchpadPoint.y),
       100.0 * ((aEventPhase == PHASE_END) ? ScreenCoord(1.f) : CurrentSpan),
       100.0 * ((aEventPhase == PHASE_END) ? ScreenCoord(1.f) : PreviousSpan),
       0);
@@ -566,48 +564,5 @@ nsresult HeadlessWidget::SynthesizeNativeTouchPadPinch(
   DispatchPinchGestureInput(inputToDispatch);
   return NS_OK;
 }
-
-nsresult HeadlessWidget::SynthesizeNativeTouchpadPan(
-    TouchpadGesturePhase aEventPhase, LayoutDeviceIntPoint aPoint,
-    double aDeltaX, double aDeltaY, int32_t aModifierFlags,
-    nsIObserver* aObserver) {
-  AutoObserverNotifier notifier(aObserver, "touchpadpanevent");
-
-  MOZ_ASSERT(NS_IsMainThread());
-
-  PanGestureInput::PanGestureType eventType = PanGestureInput::PANGESTURE_PAN;
-  switch (aEventPhase) {
-    case PHASE_BEGIN:
-      eventType = PanGestureInput::PANGESTURE_START;
-      break;
-    case PHASE_UPDATE:
-      eventType = PanGestureInput::PANGESTURE_PAN;
-      break;
-    case PHASE_END:
-      eventType = PanGestureInput::PANGESTURE_END;
-      break;
-    default:
-      return NS_ERROR_INVALID_ARG;
-  }
-
-  ScreenPoint touchpadPoint = ViewAs<ScreenPixel>(
-      aPoint - WidgetToScreenOffset(),
-      PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent);
-  PanGestureInput input(eventType, PR_IntervalNow(), TimeStamp::Now(),
-                        touchpadPoint,
-                        ScreenPoint(float(aDeltaX), float(aDeltaY)),
-                        // Same as SynthesizeNativeTouchPadPinch case we ignore
-                        // aModifierFlags.
-                        0);
-
-  // Setting mSimulateMomentum flag based on `apz.gtk.kinetic_scroll.enabled`
-  // value as we do for the GTK backend.
-  input.mSimulateMomentum = StaticPrefs::apz_gtk_kinetic_scroll_enabled();
-
-  DispatchPanGestureInput(input);
-
-  return NS_OK;
-}
-
 }  // namespace widget
 }  // namespace mozilla
diff --git a/widget/headless/HeadlessWidget.h b/widget/headless/HeadlessWidget.h
index b77ec632a90f..2b80eea70e58 100644
--- a/widget/headless/HeadlessWidget.h
+++ b/widget/headless/HeadlessWidget.h
@@ -135,12 +135,6 @@ class HeadlessWidget : public nsBaseWidget {
       TouchpadGesturePhase aEventPhase, float aScale,
       LayoutDeviceIntPoint aPoint, int32_t aModifierFlags) override;
 
-  virtual nsresult SynthesizeNativeTouchpadPan(TouchpadGesturePhase aEventPhase,
-                                               LayoutDeviceIntPoint aPoint,
-                                               double aDeltaX, double aDeltaY,
-                                               int32_t aModifierFlags,
-                                               nsIObserver* aObserver) override;
-
  private:
   ~HeadlessWidget();
   bool mEnabled;