Bug 459796 - fixing unit test orange, r+sr=roc

content/canvas/src/nsCanvasRenderingContext2D.cpp

@@ -3370,7 +3370,7 @@ nsCanvasRenderingContext2D::DrawWindow(nsIDOMWindow* aWindow, PRInt32 aX, PRInt3
     }
 
     // Flush layout updates
-    if (flags & nsIDOMCanvasRenderingContext2D::DRAWWINDOW_DO_NOT_FLUSH)
+    if (!(flags & nsIDOMCanvasRenderingContext2D::DRAWWINDOW_DO_NOT_FLUSH))
         FlushLayoutForTree(aWindow);
 
     nsCOMPtr<nsPresContext> presContext;