diff --git a/mozilla/layout/base/src/nsPresShell.cpp b/mozilla/layout/base/src/nsPresShell.cpp
index e517b80fb3c..cec5b973958 100644
--- a/mozilla/layout/base/src/nsPresShell.cpp
+++ b/mozilla/layout/base/src/nsPresShell.cpp
@@ -1021,11 +1021,6 @@ PresShell::VerifyIncrementalReflow()
 
   // Setup hierarchical relationship in view manager
   vm->SetRootView(view);
-  nsIWidget* window = view->GetWidget();
-  if (window) {
-    vm->SetRootWindow(window);
-    NS_RELEASE(window);
-  }
 
   // Make the new presentation context the same size as our
   // presentation context.
diff --git a/mozilla/webshell/src/nsDocumentViewer.cpp b/mozilla/webshell/src/nsDocumentViewer.cpp
index 6a34b174093..d0d12e0beb4 100644
--- a/mozilla/webshell/src/nsDocumentViewer.cpp
+++ b/mozilla/webshell/src/nsDocumentViewer.cpp
@@ -524,9 +524,6 @@ nsresult DocumentViewerImpl::MakeWindow(nsNativeWidget aNativeParent,
     // Setup hierarchical relationship in view manager
     mViewManager->SetRootView(mView);
     mWindow = mView->GetWidget();
-    if (nsnull != mWindow) {
-        mViewManager->SetRootWindow(mWindow);
-    }
 
     //set frame rate to 25 fps
     mViewManager->SetFrameRate(25);