[Athena] minimum impl to add screen/background and test windows

athena/athena_export.h

Index: athena/athena_export.h
diff --git a/athena/athena_export.h b/athena/athena_export.h
new file mode 100644
index 0000000000000000000000000000000000000000..7abb1fa3ed163265bccdfd0bb481089cb824136a
--- /dev/null
+++ b/athena/athena_export.h
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+// 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.
+
+#ifndef ATHENA_ATHENA_EXPORT_H_
+#define ATHENA_ATHENA_EXPORT_H_
+
+// Defines ATHENA_EXPORT so that functionality implemented by the ATHENA module
+// can be exported to consumers.
+
+#if defined(COMPONENT_BUILD)
+#if defined(WIN32)
+
+#if defined(ATHENA_IMPLEMENTATION)
+#define ATHENA_EXPORT __declspec(dllexport)
+#else
+#define ATHENA_EXPORT __declspec(dllimport)
+#endif  // defined(ATHENA_IMPLEMENTATION)
+
+#else  // defined(WIN32)
+#if defined(ATHENA_IMPLEMENTATION)
+#define ATHENA_EXPORT __attribute__((visibility("default")))
+#else
+#define ATHENA_EXPORT
+#endif
+#endif
+
+#else  // defined(COMPONENT_BUILD)
+#define ATHENA_EXPORT
+#endif
+
+#endif  // ATHENA_ATHENA_EXPORT_H_