diff --git a/view/nsView.cpp b/view/nsView.cpp
index dc4a27b0875..49cb2085144 100644
--- a/view/nsView.cpp
+++ b/view/nsView.cpp
@@ -697,11 +697,9 @@ nsresult nsView::AttachToTopLevelWidget(nsIWidget* aWidget)
     }
   }
 
-  nsRefPtr<nsDeviceContext> dx = mViewManager->GetDeviceContext();
-
   // Note, the previous device context will be released. Detaching
   // will not restore the old one.
-  nsresult rv = aWidget->AttachViewToTopLevel(!nsIWidget::UsePuppetWidgets(), dx);
+  nsresult rv = aWidget->AttachViewToTopLevel(!nsIWidget::UsePuppetWidgets());
   if (NS_FAILED(rv))
     return rv;
 
diff --git a/widget/nsBaseWidget.cpp b/widget/nsBaseWidget.cpp
index 682cf179d53..f76678e7f2c 100644
--- a/widget/nsBaseWidget.cpp
+++ b/widget/nsBaseWidget.cpp
@@ -342,8 +342,7 @@ nsBaseWidget::CreateChild(const nsIntRect  &aRect,
 
 // Attach a view to our widget which we'll send events to.
 NS_IMETHODIMP
-nsBaseWidget::AttachViewToTopLevel(bool aUseAttachedEvents,
-                                   nsDeviceContext *aContext)
+nsBaseWidget::AttachViewToTopLevel(bool aUseAttachedEvents)
 {
   NS_ASSERTION((mWindowType == eWindowType_toplevel ||
                 mWindowType == eWindowType_dialog ||
diff --git a/widget/nsBaseWidget.h b/widget/nsBaseWidget.h
index b8721223222..79cb52c5e55 100644
--- a/widget/nsBaseWidget.h
+++ b/widget/nsBaseWidget.h
@@ -215,7 +215,7 @@ public:
               nsDeviceContext *aContext,
               nsWidgetInitData *aInitData = nullptr,
               bool             aForceUseIWidgetParent = false) MOZ_OVERRIDE;
-  NS_IMETHOD              AttachViewToTopLevel(bool aUseAttachedEvents, nsDeviceContext *aContext) MOZ_OVERRIDE;
+  NS_IMETHOD              AttachViewToTopLevel(bool aUseAttachedEvents) MOZ_OVERRIDE;
   virtual nsIWidgetListener* GetAttachedWidgetListener() MOZ_OVERRIDE;
   virtual void               SetAttachedWidgetListener(nsIWidgetListener* aListener) MOZ_OVERRIDE;
   NS_IMETHOD              RegisterTouchWindow() MOZ_OVERRIDE;
diff --git a/widget/nsIWidget.h b/widget/nsIWidget.h
index dd0b60683d7..9d9fd53539e 100644
--- a/widget/nsIWidget.h
+++ b/widget/nsIWidget.h
@@ -838,10 +838,8 @@ class nsIWidget : public nsISupports {
      *
      * aUseAttachedEvents if true, events are sent to the attached listener
      * instead of the normal listener.
-     * aContext The new device context for the view
      */
-    NS_IMETHOD AttachViewToTopLevel(bool aUseAttachedEvents,
-                                    nsDeviceContext *aContext) = 0;
+    NS_IMETHOD AttachViewToTopLevel(bool aUseAttachedEvents) = 0;
 
     /**
      * Accessor functions to get and set the attached listener. Used by