Ensure that entries are correctly removed from the MimeHandlerViewContainer map

extensions/renderer/guest_view/guest_view_container.h

Index: extensions/renderer/guest_view/guest_view_container.h
diff --git a/extensions/renderer/guest_view/guest_view_container.h b/extensions/renderer/guest_view/guest_view_container.h
index df460cfd81723cfa654222464428c4461c62ae2d..85af57af54289a3aa41271f0feb6e79a09fe6b2a 100644
--- a/extensions/renderer/guest_view/guest_view_container.h
+++ b/extensions/renderer/guest_view/guest_view_container.h
@@ -28,6 +28,8 @@ class GuestViewContainer : public content::BrowserPluginDelegate {
   int render_view_routing_id() const { return render_view_routing_id_; }
   content::RenderFrame* render_frame() const { return render_frame_; }
 
+  virtual void OnRenderFrameDestroyed() {}
+
  private:
   class RenderFrameLifetimeObserver;