diff --git a/mozilla/layout/generic/nsPlaceholderFrame.cpp b/mozilla/layout/generic/nsPlaceholderFrame.cpp
index ad3426ad1ae..03e940a0a24 100644
--- a/mozilla/layout/generic/nsPlaceholderFrame.cpp
+++ b/mozilla/layout/generic/nsPlaceholderFrame.cpp
@@ -78,33 +78,6 @@ nsPlaceholderFrame::Paint(nsIPresContext& aPresContext,
   return NS_OK;
 }
 
-NS_IMETHODIMP
-nsPlaceholderFrame::ContentChanged(nsIPresContext* aPresContext,
-                                   nsIContent*     aChild,
-                                   nsISupports*    aSubContent)
-{
-  NS_ASSERTION(mContent == aChild, "bad content-changed target");
-
-  // Forward the notification to the out of flow frame
-  if (nsnull != mOutOfFlowFrame) {
-    return mOutOfFlowFrame->ContentChanged(aPresContext, aChild, aSubContent);
-  }
-  return NS_OK;
-}
-
-NS_IMETHODIMP
-nsPlaceholderFrame::AttributeChanged(nsIPresContext* aPresContext,
-                                     nsIContent* aChild,
-                                     nsIAtom* aAttribute,
-                                     PRInt32 aHint)
-{
-  // Forward the notification to the out of flow frame
-  if (nsnull != mOutOfFlowFrame) {
-    return mOutOfFlowFrame->AttributeChanged(aPresContext, aChild, aAttribute, aHint);
-  }
-  return NS_OK;
-}
-
 NS_IMETHODIMP
 nsPlaceholderFrame::GetFrameType(nsIAtom** aType) const
 {
diff --git a/mozilla/layout/generic/nsPlaceholderFrame.h b/mozilla/layout/generic/nsPlaceholderFrame.h
index f1b1cdab421..07d45630c51 100644
--- a/mozilla/layout/generic/nsPlaceholderFrame.h
+++ b/mozilla/layout/generic/nsPlaceholderFrame.h
@@ -47,15 +47,6 @@ public:
                    const nsRect& aDirtyRect,
                    nsFramePaintLayer aWhichLayer);
 
-  NS_IMETHOD  ContentChanged(nsIPresContext* aPresContext,
-                             nsIContent*     aChild,
-                             nsISupports*    aSubContent);
-
-  NS_IMETHOD AttributeChanged(nsIPresContext* aPresContext,
-                              nsIContent* aChild,
-                              nsIAtom* aAttribute,
-                              PRInt32 aHint);
-
   /**
    * Get the "type" of the frame
    *
diff --git a/mozilla/layout/html/base/src/nsPlaceholderFrame.cpp b/mozilla/layout/html/base/src/nsPlaceholderFrame.cpp
index ad3426ad1ae..03e940a0a24 100644
--- a/mozilla/layout/html/base/src/nsPlaceholderFrame.cpp
+++ b/mozilla/layout/html/base/src/nsPlaceholderFrame.cpp
@@ -78,33 +78,6 @@ nsPlaceholderFrame::Paint(nsIPresContext& aPresContext,
   return NS_OK;
 }
 
-NS_IMETHODIMP
-nsPlaceholderFrame::ContentChanged(nsIPresContext* aPresContext,
-                                   nsIContent*     aChild,
-                                   nsISupports*    aSubContent)
-{
-  NS_ASSERTION(mContent == aChild, "bad content-changed target");
-
-  // Forward the notification to the out of flow frame
-  if (nsnull != mOutOfFlowFrame) {
-    return mOutOfFlowFrame->ContentChanged(aPresContext, aChild, aSubContent);
-  }
-  return NS_OK;
-}
-
-NS_IMETHODIMP
-nsPlaceholderFrame::AttributeChanged(nsIPresContext* aPresContext,
-                                     nsIContent* aChild,
-                                     nsIAtom* aAttribute,
-                                     PRInt32 aHint)
-{
-  // Forward the notification to the out of flow frame
-  if (nsnull != mOutOfFlowFrame) {
-    return mOutOfFlowFrame->AttributeChanged(aPresContext, aChild, aAttribute, aHint);
-  }
-  return NS_OK;
-}
-
 NS_IMETHODIMP
 nsPlaceholderFrame::GetFrameType(nsIAtom** aType) const
 {
diff --git a/mozilla/layout/html/base/src/nsPlaceholderFrame.h b/mozilla/layout/html/base/src/nsPlaceholderFrame.h
index f1b1cdab421..07d45630c51 100644
--- a/mozilla/layout/html/base/src/nsPlaceholderFrame.h
+++ b/mozilla/layout/html/base/src/nsPlaceholderFrame.h
@@ -47,15 +47,6 @@ public:
                    const nsRect& aDirtyRect,
                    nsFramePaintLayer aWhichLayer);
 
-  NS_IMETHOD  ContentChanged(nsIPresContext* aPresContext,
-                             nsIContent*     aChild,
-                             nsISupports*    aSubContent);
-
-  NS_IMETHOD AttributeChanged(nsIPresContext* aPresContext,
-                              nsIContent* aChild,
-                              nsIAtom* aAttribute,
-                              PRInt32 aHint);
-
   /**
    * Get the "type" of the frame
    *