Additional checks/calls for cases when WebUI may be already gone but OOBE screen instance is not

chrome/browser/chromeos/login/mock_network_screen.h

Index: chrome/browser/chromeos/login/mock_network_screen.h
diff --git a/chrome/browser/chromeos/login/mock_network_screen.h b/chrome/browser/chromeos/login/mock_network_screen.h
index 8cd798f285f76e456a1f27f3bd5d5808435c805f..30b38d2f70bc20533e15916f192a40fa61e70ee0 100644
--- a/chrome/browser/chromeos/login/mock_network_screen.h
+++ b/chrome/browser/chromeos/login/mock_network_screen.h
@@ -23,7 +23,9 @@ class MockNetworkScreenActor : public NetworkScreenActor {
   MockNetworkScreenActor();
   virtual ~MockNetworkScreenActor();
 
-  MOCK_METHOD1(SetDelegate, void(Delegate* screen));
+  virtual void SetDelegate(Delegate* delegate);
+
+  MOCK_METHOD1(MockSetDelegate, void(Delegate* delegate));
   MOCK_METHOD0(PrepareToShow, void());
   MOCK_METHOD0(Show, void());
   MOCK_METHOD0(Hide, void());
@@ -34,6 +36,10 @@ class MockNetworkScreenActor : public NetworkScreenActor {
   MOCK_METHOD1(EnableContinue, void(bool enabled));
   MOCK_CONST_METHOD0(IsContinueEnabled, bool());
   MOCK_CONST_METHOD0(IsConnecting, bool());
+
+  private:
+   Delegate* delegate_;
+
 };
 
 }  // namespace chromeos