[Ozone-DRI] Assume window IPC arrives before surface IPC

ui/ozone/platform/dri/dri_window_delegate_manager.h

Index: ui/ozone/platform/dri/dri_window_delegate_manager.h
diff --git a/ui/ozone/platform/dri/dri_window_delegate_manager.h b/ui/ozone/platform/dri/dri_window_delegate_manager.h
index 5f2a572c49e4b738ea4d50154dead4a53fdc564c..eb4f7b923145e14a7e9ee57c7f40878568056fe8 100644
--- a/ui/ozone/platform/dri/dri_window_delegate_manager.h
+++ b/ui/ozone/platform/dri/dri_window_delegate_manager.h
@@ -31,9 +31,6 @@ class DriWindowDelegateManager {
   // be called only if a valid delegate has been associated with |widget|.
   DriWindowDelegate* GetWindowDelegate(gfx::AcceleratedWidget widget);
 
-  // Check if |widget| has a valid delegate associated with it.
-  bool HasWindowDelegate(gfx::AcceleratedWidget widget);
-
  private:
   typedef base::ScopedPtrHashMap<gfx::AcceleratedWidget, DriWindowDelegate>
       WidgetToDelegateMap;