--- a/layout/style/ServoStyleSet.cpp
+++ b/layout/style/ServoStyleSet.cpp
@@ -1021,16 +1021,28 @@ ServoStyleSet::MarkOriginsDirty(OriginFl
 {
   SetStylistStyleSheetsDirty();
   Servo_StyleSet_NoteStyleSheetsChanged(mRawSet.get(),
                                         mAuthorStyleDisabled,
                                         aChangedOrigins);
 }
 
 void
+ServoStyleSet::SetStylistStyleSheetsDirty()
+{
+  mStylistState |= StylistState::StyleSheetsDirty;
+}
+
+void
+ServoStyleSet::SetStylistXBLStyleSheetsDirty()
+{
+  mStylistState |= StylistState::XBLStyleSheetsDirty;
+}
+
+void
 ServoStyleSet::RecordStyleSheetChange(
     ServoStyleSheet* aSheet,
     StyleSheet::ChangeType aChangeType)
 {
   switch (aChangeType) {
     case StyleSheet::ChangeType::RuleAdded:
     case StyleSheet::ChangeType::RuleRemoved:
     case StyleSheet::ChangeType::RuleChanged:

--- a/layout/style/ServoStyleSet.h
+++ b/layout/style/ServoStyleSet.h
@@ -549,25 +549,19 @@ private:
    * changed since the last.  Calling this will ensure that the Stylist
    * rebuilds its selector maps.
    */
   void MarkOriginsDirty(OriginFlags aChangedOrigins);
 
   /**
    * Note that the stylist needs a style flush due to style sheet changes.
    */
-  void SetStylistStyleSheetsDirty()
-  {
-    mStylistState |= StylistState::StyleSheetsDirty;
-  }
+  void SetStylistStyleSheetsDirty();
 
-  void SetStylistXBLStyleSheetsDirty()
-  {
-    mStylistState |= StylistState::XBLStyleSheetsDirty;
-  }
+  void SetStylistXBLStyleSheetsDirty();
 
   bool StylistNeedsUpdate() const
   {
     return mStylistState != StylistState::NotDirty;
   }
 
   /**
    * Update the stylist as needed to ensure style data is up-to-date.