--- a/widget/cocoa/nsCocoaWindow.h
+++ b/widget/cocoa/nsCocoaWindow.h
@@ -211,16 +211,18 @@ public:
     NS_IMETHOD              Create(nsIWidget* aParent,
                                    nsNativeWidget aNativeParent,
                                    const nsIntRect &aRect,
                                    nsDeviceContext *aContext,
                                    nsWidgetInitData *aInitData = nullptr);
 
     NS_IMETHOD              Destroy();
 
+    virtual nsIWidget*      GetParent(void);
+
     NS_IMETHOD              Show(bool aState);
     virtual nsIWidget*      GetSheetWindowParent(void);
     NS_IMETHOD              Enable(bool aState);
     virtual bool            IsEnabled() const;
     NS_IMETHOD              SetModal(bool aState);
     virtual bool            IsVisible() const;
     NS_IMETHOD              SetFocus(bool aState=false);
     virtual nsIntPoint WidgetToScreenOffset();

--- a/widget/cocoa/nsCocoaWindow.mm
+++ b/widget/cocoa/nsCocoaWindow.mm
@@ -529,16 +529,21 @@ NS_IMETHODIMP nsCocoaWindow::Destroy()
     } else if (mWindow) {
       nsCocoaUtils::HideOSChromeOnScreen(false, [mWindow screen]);
     }
   }
 
   return NS_OK;
 }
 
+nsIWidget* nsCocoaWindow::GetParent()
+{
+  return mParent;
+}
+
 nsIWidget* nsCocoaWindow::GetSheetWindowParent(void)
 {
   if (mWindowType != eWindowType_sheet)
     return nullptr;
   nsCocoaWindow *parent = static_cast<nsCocoaWindow*>(mParent);
   while (parent && (parent->mWindowType == eWindowType_sheet))
     parent = static_cast<nsCocoaWindow*>(parent->mParent);
   return parent;