--- a/layout/base/ServoRestyleManager.cpp
+++ b/layout/base/ServoRestyleManager.cpp
@@ -271,24 +271,26 @@ ServoRestyleManager::ProcessPendingResty
 
   IncrementRestyleGeneration();
 }
 
 void
 ServoRestyleManager::RestyleForInsertOrChange(Element* aContainer,
                                               nsIContent* aChild)
 {
-  NS_WARNING("stylo: ServoRestyleManager::RestyleForInsertOrChange not implemented");
+  // XXX Emilio we can do way better.
+  PostRestyleEvent(aContainer, eRestyle_Subtree, nsChangeHint(0));
 }
 
 void
 ServoRestyleManager::RestyleForAppend(Element* aContainer,
                                       nsIContent* aFirstNewContent)
 {
-  NS_WARNING("stylo: ServoRestyleManager::RestyleForAppend not implemented");
+  // XXX Emilio we can do way better.
+  PostRestyleEvent(aContainer, eRestyle_Subtree, nsChangeHint(0));
 }
 
 void
 ServoRestyleManager::RestyleForRemove(Element* aContainer,
                                       nsIContent* aOldChild,
                                       nsIContent* aFollowingSibling)
 {
   NS_WARNING("stylo: ServoRestyleManager::RestyleForRemove not implemented");