diff --git a/mozilla/content/base/src/nsDocument.h b/mozilla/content/base/src/nsDocument.h
index 7393497828b..fa249f6b108 100644
--- a/mozilla/content/base/src/nsDocument.h
+++ b/mozilla/content/base/src/nsDocument.h
@@ -268,6 +268,8 @@ public:
 
   // Observation hooks used by content nodes to propagate
   // notifications to document observers.
+  NS_IMETHOD BeginUpdate();
+  NS_IMETHOD EndUpdate();
   NS_IMETHOD BeginLoad();
   NS_IMETHOD EndLoad();
   NS_IMETHOD ContentChanged(nsIContent* aContent,
diff --git a/mozilla/layout/base/src/nsDocument.h b/mozilla/layout/base/src/nsDocument.h
index 7393497828b..fa249f6b108 100644
--- a/mozilla/layout/base/src/nsDocument.h
+++ b/mozilla/layout/base/src/nsDocument.h
@@ -268,6 +268,8 @@ public:
 
   // Observation hooks used by content nodes to propagate
   // notifications to document observers.
+  NS_IMETHOD BeginUpdate();
+  NS_IMETHOD EndUpdate();
   NS_IMETHOD BeginLoad();
   NS_IMETHOD EndLoad();
   NS_IMETHOD ContentChanged(nsIContent* aContent,