diff --git a/mozilla/widget/src/xpwidgets/nsBaseWidget.cpp b/mozilla/widget/src/xpwidgets/nsBaseWidget.cpp
index 96bb6d82a7b..1ab490f5672 100644
--- a/mozilla/widget/src/xpwidgets/nsBaseWidget.cpp
+++ b/mozilla/widget/src/xpwidgets/nsBaseWidget.cpp
@@ -554,6 +554,15 @@ NS_METHOD nsBaseWidget::GetBounds(nsRect &aRect)
   return NS_OK;
 }
 
+/**
+* If the implementation of nsWindow uses a local coordinate system within the window,
+* this method must be overridden
+*
+**/
+NS_METHOD nsBaseWidget::GetScreenBounds(nsRect &aRect)
+{
+  return GetBounds(aRect);
+}
 
 /**
 * If the implementation of nsWindow supports borders this method MUST be overridden
diff --git a/mozilla/widget/src/xpwidgets/nsBaseWidget.h b/mozilla/widget/src/xpwidgets/nsBaseWidget.h
index 100c796c375..8bd18e27a1d 100644
--- a/mozilla/widget/src/xpwidgets/nsBaseWidget.h
+++ b/mozilla/widget/src/xpwidgets/nsBaseWidget.h
@@ -91,6 +91,7 @@ public:
   NS_IMETHOD              GetBounds(nsRect &aRect);
   NS_IMETHOD              GetBoundsAppUnits(nsRect &aRect, float aAppUnits);
   NS_IMETHOD              GetClientBounds(nsRect &aRect);
+  NS_IMETHOD              GetScreenBounds(nsRect &aRect);
   NS_IMETHOD              GetBorderSize(PRInt32 &aWidth, PRInt32 &aHeight);
   NS_IMETHOD              Paint(nsIRenderingContext& aRenderingContext, const nsRect& aDirtyRect);
   NS_IMETHOD              ScrollRect(nsRect &aRect, PRInt32 aDx, PRInt32 aDy);