diff --git a/content/events/src/nsDOMEvent.cpp b/content/events/src/nsDOMEvent.cpp
index 36b337fec67..2d929c0aa42 100644
--- a/content/events/src/nsDOMEvent.cpp
+++ b/content/events/src/nsDOMEvent.cpp
@@ -22,7 +22,6 @@
 #include "nsIFrame.h"
 #include "nsIContent.h"
 #include "nsIRenderingContext.h"
-#include "nsIDOMRenderingContext.h"
 #include "nsIWidget.h"
 #include "nsIWebShell.h"
 #include "nsIPresShell.h"
@@ -687,24 +686,6 @@ const char* nsDOMEvent::GetEventName(PRUint32 aEventType)
   return nsnull;
 }
 
-static NS_DEFINE_IID(kIDOMRenderingContextIID, NS_IDOMRENDERINGCONTEXT_IID);
-
-NS_IMETHODIMP
-nsDOMEvent::GetRc(nsIDOMRenderingContext** aRc)
-{
-  *aRc = nsnull;
-  if (NS_PAINT_EVENT == mEvent->eventStructType) {
-    nsPaintEvent* pe = (nsPaintEvent*) mEvent;
-    if (nsnull != pe->renderingContext) {
-      nsIDOMRenderingContext* domrc;
-      if (NS_OK == pe->renderingContext->QueryInterface(kIDOMRenderingContextIID, (void**) &domrc)) {
-        *aRc = domrc;
-      }
-    }
-  }
-  return NS_OK;
-}
-
 nsresult NS_NewDOMUIEvent(nsIDOMEvent** aInstancePtrResult, nsIPresContext& aPresContext, nsEvent *aEvent) 
 {
   nsDOMEvent* it = new nsDOMEvent(&aPresContext, aEvent);
diff --git a/content/events/src/nsDOMEvent.h b/content/events/src/nsDOMEvent.h
index 9ca783d74b7..dcbc865123a 100644
--- a/content/events/src/nsDOMEvent.h
+++ b/content/events/src/nsDOMEvent.h
@@ -32,8 +32,6 @@
 #include "nsGUIEvent.h"
 class nsIContent;
 
-class nsIDOMRenderingContext;
-
 class nsDOMEvent : public nsIDOMUIEvent, public nsIDOMNSUIEvent, public nsIPrivateDOMEvent, public nsIPrivateTextEvent, public nsIPrivateCompositionEvent {
 
 public:
@@ -110,7 +108,7 @@ public:
 
   NS_IMETHOD    GetClickcount(PRUint16* aClickcount);  
     
-  // nsIDOMNSEvent interface
+  // nsIDOMNSUIEvent interface
   NS_IMETHOD    GetLayerX(PRInt32* aLayerX);
 
   NS_IMETHOD    GetLayerY(PRInt32* aLayerY);
@@ -121,8 +119,6 @@ public:
 
   NS_IMETHOD    GetWhich(PRUint32* aKeyCode);
 
-  NS_IMETHOD    GetRc(nsIDOMRenderingContext** aRc);
-
   NS_IMETHOD    GetRangeParent(nsIDOMNode** aRangeParent);
 
   NS_IMETHOD    GetRangeOffset(PRInt32* aRangeOffset);
diff --git a/layout/events/src/nsDOMEvent.cpp b/layout/events/src/nsDOMEvent.cpp
index 36b337fec67..2d929c0aa42 100644
--- a/layout/events/src/nsDOMEvent.cpp
+++ b/layout/events/src/nsDOMEvent.cpp
@@ -22,7 +22,6 @@
 #include "nsIFrame.h"
 #include "nsIContent.h"
 #include "nsIRenderingContext.h"
-#include "nsIDOMRenderingContext.h"
 #include "nsIWidget.h"
 #include "nsIWebShell.h"
 #include "nsIPresShell.h"
@@ -687,24 +686,6 @@ const char* nsDOMEvent::GetEventName(PRUint32 aEventType)
   return nsnull;
 }
 
-static NS_DEFINE_IID(kIDOMRenderingContextIID, NS_IDOMRENDERINGCONTEXT_IID);
-
-NS_IMETHODIMP
-nsDOMEvent::GetRc(nsIDOMRenderingContext** aRc)
-{
-  *aRc = nsnull;
-  if (NS_PAINT_EVENT == mEvent->eventStructType) {
-    nsPaintEvent* pe = (nsPaintEvent*) mEvent;
-    if (nsnull != pe->renderingContext) {
-      nsIDOMRenderingContext* domrc;
-      if (NS_OK == pe->renderingContext->QueryInterface(kIDOMRenderingContextIID, (void**) &domrc)) {
-        *aRc = domrc;
-      }
-    }
-  }
-  return NS_OK;
-}
-
 nsresult NS_NewDOMUIEvent(nsIDOMEvent** aInstancePtrResult, nsIPresContext& aPresContext, nsEvent *aEvent) 
 {
   nsDOMEvent* it = new nsDOMEvent(&aPresContext, aEvent);
diff --git a/layout/events/src/nsDOMEvent.h b/layout/events/src/nsDOMEvent.h
index 9ca783d74b7..dcbc865123a 100644
--- a/layout/events/src/nsDOMEvent.h
+++ b/layout/events/src/nsDOMEvent.h
@@ -32,8 +32,6 @@
 #include "nsGUIEvent.h"
 class nsIContent;
 
-class nsIDOMRenderingContext;
-
 class nsDOMEvent : public nsIDOMUIEvent, public nsIDOMNSUIEvent, public nsIPrivateDOMEvent, public nsIPrivateTextEvent, public nsIPrivateCompositionEvent {
 
 public:
@@ -110,7 +108,7 @@ public:
 
   NS_IMETHOD    GetClickcount(PRUint16* aClickcount);  
     
-  // nsIDOMNSEvent interface
+  // nsIDOMNSUIEvent interface
   NS_IMETHOD    GetLayerX(PRInt32* aLayerX);
 
   NS_IMETHOD    GetLayerY(PRInt32* aLayerY);
@@ -121,8 +119,6 @@ public:
 
   NS_IMETHOD    GetWhich(PRUint32* aKeyCode);
 
-  NS_IMETHOD    GetRc(nsIDOMRenderingContext** aRc);
-
   NS_IMETHOD    GetRangeParent(nsIDOMNode** aRangeParent);
 
   NS_IMETHOD    GetRangeOffset(PRInt32* aRangeOffset);