Creates mus test helper class

components/mus/public/cpp/tests/test_window_tree_connection_setup.h

Index: components/mus/public/cpp/tests/test_window_tree_connection_setup.h
diff --git a/components/mus/public/cpp/tests/test_window_tree_connection_setup.h b/components/mus/public/cpp/tests/test_window_tree_connection_setup.h
new file mode 100644
index 0000000000000000000000000000000000000000..a1f43ed0a41fa5def93e7a4a2a83ccf1a0fc40f2
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+++ b/components/mus/public/cpp/tests/test_window_tree_connection_setup.h
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+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef COMPONENTS_MUS_PUBLIC_CPP_TESTS_TEST_WINDOW_TREE_CONNECTION_SETUP_H_
+#define COMPONENTS_MUS_PUBLIC_CPP_TESTS_TEST_WINDOW_TREE_CONNECTION_SETUP_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "components/mus/public/cpp/window_tree_connection_observer.h"
+
+namespace mus {
+
+class TestWindowTree;
+class WindowManagerDelegate;
+class WindowTreeClientImpl;
+class WindowTreeConnection;
+class WindowTreeDelegate;
+
+// TestWindowTreeConnectionSetup is used to create a WindowTreeConnection
+// (really a WindowTreeClientImpl) that is not connected to mus.
+class TestWindowTreeConnectionSetup : public mus::WindowTreeConnectionObserver {
+ public:
+  TestWindowTreeConnectionSetup();
+  ~TestWindowTreeConnectionSetup() override;
+
+  // Initializes the WindowTreeConnection. |window_manager_delegate| may be
+  // null.
+  void Init(WindowTreeDelegate* window_tree_delegate,
+            WindowManagerDelegate* window_manager_delegate);
+
+  // The WindowTree that WindowTreeConnection talks to.
+  TestWindowTree* window_tree() { return window_tree_.get(); }
+
+  WindowTreeConnection* window_tree_connection();
+
+ private:
+  // mus::WindowTreeConnectionObserver:
+  void OnWillDestroyConnection(mus::WindowTreeConnection* connection) override;
+
+  std::unique_ptr<TestWindowTree> window_tree_;
+
+  // See description of WindowTreeDelegate for details on ownership. The
+  // WindowTreeClientImpl may be deleted during shutdown by the test. If not,
+  // we own it and must delete it.
+  std::unique_ptr<WindowTreeClientImpl> window_tree_client_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestWindowTreeConnectionSetup);
+};
+
+}  // namespace mus
+
+#endif  // COMPONENTS_MUS_PUBLIC_CPP_TESTS_TEST_WINDOW_TREE_CONNECTION_SETUP_H_