--- a/gfx/webrender_bindings/WebRenderAPI.cpp
+++ b/gfx/webrender_bindings/WebRenderAPI.cpp
@@ -202,25 +202,16 @@ TransactionBuilder::UpdateDynamicPropert
   wr_transaction_update_dynamic_properties(
       mTxn,
       aOpacityArray.IsEmpty() ?  nullptr : aOpacityArray.Elements(),
       aOpacityArray.Length(),
       aTransformArray.IsEmpty() ?  nullptr : aTransformArray.Elements(),
       aTransformArray.Length());
 }
 
-void
-TransactionBuilder::AppendTransformProperties(const nsTArray<wr::WrTransformProperty>& aTransformArray)
-{
-  wr_transaction_append_transform_properties(
-      mTxn,
-      aTransformArray.IsEmpty() ? nullptr : aTransformArray.Elements(),
-      aTransformArray.Length());
-}
-
 bool
 TransactionBuilder::IsEmpty() const
 {
   return wr_transaction_is_empty(mTxn);
 }
 
 void
 TransactionBuilder::SetWindowParameters(const LayoutDeviceIntSize& aWindowSize,

--- a/gfx/webrender_bindings/WebRenderAPI.h
+++ b/gfx/webrender_bindings/WebRenderAPI.h
@@ -70,17 +70,16 @@ public:
                       wr::Vec<uint8_t>& dl_data);
 
   void ClearDisplayList(Epoch aEpoch, wr::WrPipelineId aPipeline);
 
   void GenerateFrame();
 
   void UpdateDynamicProperties(const nsTArray<wr::WrOpacityProperty>& aOpacityArray,
                                const nsTArray<wr::WrTransformProperty>& aTransformArray);
-  void AppendTransformProperties(const nsTArray<wr::WrTransformProperty>& aTransformArray);
 
   void SetWindowParameters(const LayoutDeviceIntSize& aWindowSize,
                            const LayoutDeviceIntRect& aDocRect);
 
   void UpdateScrollPosition(const wr::WrPipelineId& aPipelineId,
                             const layers::FrameMetrics::ViewID& aScrollId,
                             const wr::LayoutPoint& aScrollPosition);