Fix crash during shutdown

athena/env/athena_env_unittest.cc

Index: athena/env/athena_env_unittest.cc
diff --git a/athena/env/athena_env_unittest.cc b/athena/env/athena_env_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1c092a2cd1f22f17d2863a687af37be193d299f4
--- /dev/null
+++ b/athena/env/athena_env_unittest.cc
@@ -0,0 +1,38 @@
+// Copyright 2014 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.
+
+#include "athena/env/public/athena_env.h"
+
+#include "athena/test/athena_test_base.h"
+#include "base/bind.h"
+#include "ui/gfx/display.h"
+#include "ui/gfx/screen.h"
+
+namespace athena {
+
+namespace {
+
+class AthenaShutdownTest : public test::AthenaTestBase {
+ public:
+  AthenaShutdownTest() {}
+  virtual ~AthenaShutdownTest() {}
+
+  virtual void TearDown() {
+    test::AthenaTestBase::TearDown();
+    ASSERT_NE(
+        gfx::Display::kInvalidDisplayID,
+        gfx::Screen::GetNativeScreen()->GetPrimaryDisplay().id());
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(AthenaShutdownTest);
+};
+
+}  // namespace
+
+// gfx::Screen should be accessible after shutdown.
+TEST_F(AthenaShutdownTest, Shutdown) {
+}
+
+}  // namespace athena