diff --git a/mozilla/layout/generic/nsHTMLContainerFrame.cpp b/mozilla/layout/generic/nsHTMLContainerFrame.cpp
index 38a9e394d68..c171c79dced 100644
--- a/mozilla/layout/generic/nsHTMLContainerFrame.cpp
+++ b/mozilla/layout/generic/nsHTMLContainerFrame.cpp
@@ -192,19 +192,6 @@ NS_METHOD nsHTMLContainerFrame::ContentAppended(nsIPresShell*   aShell,
   return NS_OK;
 }
 
-NS_METHOD nsHTMLContainerFrame::ContentChanged(nsIPresShell*   aShell,
-                                               nsIPresContext* aPresContext,
-                                               nsIContent*     aContainer,
-                                               nsISupports*    aSubContent)
-{
-  // Generate a reflow command with our geometric parent as the target,
-  // and us as the child frame
-  nsReflowCommand* cmd = new nsReflowCommand(aPresContext, mGeometricParent,
-                                             nsReflowCommand::FrameAppended, this);
-  aShell->AppendReflowCommand(cmd);
-  return NS_OK;
-}
-
 static PRBool
 HasSameMapping(nsIFrame* aFrame, nsIContent* aContent)
 {
diff --git a/mozilla/layout/generic/nsHTMLContainerFrame.h b/mozilla/layout/generic/nsHTMLContainerFrame.h
index 1fe400249ae..812f6bf0d0b 100644
--- a/mozilla/layout/generic/nsHTMLContainerFrame.h
+++ b/mozilla/layout/generic/nsHTMLContainerFrame.h
@@ -51,11 +51,6 @@ public:
                              nsIContent*     aChild,
                              PRInt32         aIndexInParent);
 
-  NS_IMETHOD  ContentChanged(nsIPresShell*   aShell,
-                             nsIPresContext* aPresContext,
-                             nsIContent*     aChild,
-                             nsISupports*    aSubContent);
-
 protected:
   virtual ~nsHTMLContainerFrame();
 
diff --git a/mozilla/layout/html/base/src/nsHTMLContainerFrame.cpp b/mozilla/layout/html/base/src/nsHTMLContainerFrame.cpp
index 38a9e394d68..c171c79dced 100644
--- a/mozilla/layout/html/base/src/nsHTMLContainerFrame.cpp
+++ b/mozilla/layout/html/base/src/nsHTMLContainerFrame.cpp
@@ -192,19 +192,6 @@ NS_METHOD nsHTMLContainerFrame::ContentAppended(nsIPresShell*   aShell,
   return NS_OK;
 }
 
-NS_METHOD nsHTMLContainerFrame::ContentChanged(nsIPresShell*   aShell,
-                                               nsIPresContext* aPresContext,
-                                               nsIContent*     aContainer,
-                                               nsISupports*    aSubContent)
-{
-  // Generate a reflow command with our geometric parent as the target,
-  // and us as the child frame
-  nsReflowCommand* cmd = new nsReflowCommand(aPresContext, mGeometricParent,
-                                             nsReflowCommand::FrameAppended, this);
-  aShell->AppendReflowCommand(cmd);
-  return NS_OK;
-}
-
 static PRBool
 HasSameMapping(nsIFrame* aFrame, nsIContent* aContent)
 {
diff --git a/mozilla/layout/html/base/src/nsHTMLContainerFrame.h b/mozilla/layout/html/base/src/nsHTMLContainerFrame.h
index 1fe400249ae..812f6bf0d0b 100644
--- a/mozilla/layout/html/base/src/nsHTMLContainerFrame.h
+++ b/mozilla/layout/html/base/src/nsHTMLContainerFrame.h
@@ -51,11 +51,6 @@ public:
                              nsIContent*     aChild,
                              PRInt32         aIndexInParent);
 
-  NS_IMETHOD  ContentChanged(nsIPresShell*   aShell,
-                             nsIPresContext* aPresContext,
-                             nsIContent*     aChild,
-                             nsISupports*    aSubContent);
-
 protected:
   virtual ~nsHTMLContainerFrame();