--- a/layout/style/ServoBindings.cpp
+++ b/layout/style/ServoBindings.cpp
@@ -840,16 +840,29 @@ Gecko_DestroyClipPath(mozilla::StyleClip
 
 mozilla::StyleBasicShape*
 Gecko_NewBasicShape(mozilla::StyleBasicShapeType aType)
 {
   RefPtr<StyleBasicShape> ptr = new mozilla::StyleBasicShape(aType);
   return ptr.forget().take();
 }
 
+void
+Gecko_ResetFilters(nsStyleEffects* effects, size_t new_len)
+{
+  effects->mFilters.Clear();
+  effects->mFilters.SetLength(new_len);
+}
+
+void
+Gecko_CopyFiltersFrom(nsStyleEffects* aSrc, nsStyleEffects* aDest)
+{
+  aDest->mFilters = aSrc->mFilters;
+}
+
 NS_IMPL_THREADSAFE_FFI_REFCOUNTING(nsStyleCoord::Calc, Calc);
 
 nsCSSShadowArray*
 Gecko_NewCSSShadowArray(uint32_t aLen)
 {
   RefPtr<nsCSSShadowArray> arr = new(aLen) nsCSSShadowArray(aLen);
   return arr.forget().take();
 }

--- a/layout/style/ServoBindings.h
+++ b/layout/style/ServoBindings.h
@@ -306,16 +306,19 @@ void Gecko_ResetStyleCoord(nsStyleUnit* 
 // Set an nsStyleCoord to a computed `calc()` value
 void Gecko_SetStyleCoordCalcValue(nsStyleUnit* unit, nsStyleUnion* value, nsStyleCoord::CalcValue calc);
 
 void Gecko_CopyClipPathValueFrom(mozilla::StyleClipPath* dst, const mozilla::StyleClipPath* src);
 
 void Gecko_DestroyClipPath(mozilla::StyleClipPath* clip);
 mozilla::StyleBasicShape* Gecko_NewBasicShape(mozilla::StyleBasicShapeType type);
 
+void Gecko_ResetFilters(nsStyleEffects* effects, size_t new_len);
+void Gecko_CopyFiltersFrom(nsStyleEffects* aSrc, nsStyleEffects* aDest);
+
 void Gecko_FillAllBackgroundLists(nsStyleImageLayers* layers, uint32_t max_len);
 void Gecko_FillAllMaskLists(nsStyleImageLayers* layers, uint32_t max_len);
 NS_DECL_THREADSAFE_FFI_REFCOUNTING(nsStyleCoord::Calc, Calc);
 
 nsCSSShadowArray* Gecko_NewCSSShadowArray(uint32_t len);
 NS_DECL_THREADSAFE_FFI_REFCOUNTING(nsCSSShadowArray, CSSShadowArray);
 
 // Style-struct management.

--- a/layout/style/nsStyleStruct.h
+++ b/layout/style/nsStyleStruct.h
@@ -3725,17 +3725,17 @@ struct nsStyleFilter
 
   nsStyleFilter& operator=(const nsStyleFilter& aOther);
 
   bool operator==(const nsStyleFilter& aOther) const;
   bool operator!=(const nsStyleFilter& aOther) const {
     return !(*this == aOther);
   }
 
-  int32_t GetType() const {
+  uint32_t GetType() const {
     return mType;
   }
 
   const nsStyleCoord& GetFilterParameter() const {
     NS_ASSERTION(mType != NS_STYLE_FILTER_DROP_SHADOW &&
                  mType != NS_STYLE_FILTER_URL &&
                  mType != NS_STYLE_FILTER_NONE, "wrong filter type");
     return mFilterParameter;
@@ -3755,17 +3755,17 @@ struct nsStyleFilter
     return mDropShadow;
   }
   void SetDropShadow(nsCSSShadowArray* aDropShadow);
 
 private:
   void ReleaseRef();
   void CopyURL(const nsStyleFilter& aOther);
 
-  int32_t mType; // see NS_STYLE_FILTER_* constants in nsStyleConsts.h
+  uint32_t mType; // see NS_STYLE_FILTER_* constants in nsStyleConsts.h
   nsStyleCoord mFilterParameter; // coord, percent, factor, angle
   union {
     mozilla::FragmentOrURL* mURL;
     nsCSSShadowArray* mDropShadow;
   };
 };
 
 template<>