--- a/widget/android/AndroidCompositorWidget.cpp
+++ b/widget/android/AndroidCompositorWidget.cpp
@@ -5,65 +5,16 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #include "AndroidCompositorWidget.h"
 #include "nsWindow.h"
 
 namespace mozilla {
 namespace widget {
 
-void
-AndroidCompositorWidget::SetFirstPaintViewport(const LayerIntPoint& aOffset,
-                                               const CSSToLayerScale& aZoom,
-                                               const CSSRect& aCssPageRect)
-{
-    auto layerClient = static_cast<nsWindow*>(RealWidget())->GetLayerClient();
-    if (!layerClient) {
-        return;
-    }
-
-    layerClient->SetFirstPaintViewport(
-            float(aOffset.x), float(aOffset.y), aZoom.scale, aCssPageRect.x,
-            aCssPageRect.y, aCssPageRect.XMost(), aCssPageRect.YMost());
-}
-
-void
-AndroidCompositorWidget::SyncFrameMetrics(const ParentLayerPoint& aScrollOffset,
-                                          const CSSToParentLayerScale& aZoom,
-                                          const CSSRect& aCssPageRect,
-                                          const CSSRect& aDisplayPort,
-                                          const CSSToLayerScale& aPaintedResolution,
-                                          bool aLayersUpdated,
-                                          int32_t aPaintSyncId,
-                                          ScreenMargin& aFixedLayerMargins)
-{
-    auto layerClient = static_cast<nsWindow*>(RealWidget())->GetLayerClient();
-    if (!layerClient) {
-        return;
-    }
-
-    // convert the displayport rect from document-relative CSS pixels to
-    // document-relative device pixels
-    LayerIntRect dp = gfx::RoundedToInt(aDisplayPort * aPaintedResolution);
-
-    java::ViewTransform::LocalRef viewTransform = layerClient->SyncFrameMetrics(
-            aScrollOffset.x, aScrollOffset.y, aZoom.scale,
-            aCssPageRect.x, aCssPageRect.y,
-            aCssPageRect.XMost(), aCssPageRect.YMost(),
-            dp.x, dp.y, dp.width, dp.height,
-            aPaintedResolution.scale, aLayersUpdated, aPaintSyncId);
-
-    MOZ_ASSERT(viewTransform, "No view transform object!");
-
-    aFixedLayerMargins.top = viewTransform->FixedLayerMarginTop();
-    aFixedLayerMargins.right = viewTransform->FixedLayerMarginRight();
-    aFixedLayerMargins.bottom = viewTransform->FixedLayerMarginBottom();
-    aFixedLayerMargins.left = viewTransform->FixedLayerMarginLeft();
-}
-
 EGLNativeWindowType
 AndroidCompositorWidget::GetEGLNativeWindow()
 {
   return (EGLNativeWindowType)mWidget->GetNativeData(NS_JAVA_SURFACE);
 }
 
 EGLNativeWindowType
 AndroidCompositorWidget::GetPresentationEGLSurface()

--- a/widget/android/AndroidCompositorWidget.h
+++ b/widget/android/AndroidCompositorWidget.h
@@ -24,29 +24,16 @@ namespace widget {
  */
 class AndroidCompositorWidget final : public InProcessCompositorWidget
 {
 public:
     using InProcessCompositorWidget::InProcessCompositorWidget;
 
     AndroidCompositorWidget* AsAndroid() override { return this; }
 
-    void SetFirstPaintViewport(const LayerIntPoint& aOffset,
-                               const CSSToLayerScale& aZoom,
-                               const CSSRect& aCssPageRect);
-
-    void SyncFrameMetrics(const ParentLayerPoint& aScrollOffset,
-                          const CSSToParentLayerScale& aZoom,
-                          const CSSRect& aCssPageRect,
-                          const CSSRect& aDisplayPort,
-                          const CSSToLayerScale& aPaintedResolution,
-                          bool aLayersUpdated,
-                          int32_t aPaintSyncId,
-                          ScreenMargin& aFixedLayerMargins);
-
     EGLNativeWindowType GetEGLNativeWindow();
 
     EGLSurface GetPresentationEGLSurface();
     void SetPresentationEGLSurface(EGLSurface aVal);
 
     ANativeWindow* GetPresentationANativeWindow();
 };