services/ui: Create a proper component for the client-lib.

services/ui/public/cpp/ui_export.h

Index: services/ui/public/cpp/ui_export.h
diff --git a/services/ui/public/cpp/ui_export.h b/services/ui/public/cpp/ui_export.h
new file mode 100644
index 0000000000000000000000000000000000000000..4330454307971294a9ffec9155256fb465e56bc9
--- /dev/null
+++ b/services/ui/public/cpp/ui_export.h
@@ -0,0 +1,29 @@
+// 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 SERVICES_UI_PUBLIC_CPP_UI_EXPORT_H_
+#define SERVICES_UI_PUBLIC_CPP_UI_EXPORT_H_
+
+#if defined(COMPONENT_BUILD)
+#if defined(WIN32)
+
+#if defined(UI_IMPLEMENTATION)
+#define UI_EXPORT __declspec(dllexport)
+#else
+#define UI_EXPORT __declspec(dllimport)
+#endif  // defined(UI_IMPLEMENTATION)
+
+#else  // defined(WIN32)
+#if defined(UI_IMPLEMENTATION)
+#define UI_EXPORT __attribute__((visibility("default")))
+#else
+#define UI_EXPORT
+#endif
+#endif
+
+#else  // defined(COMPONENT_BUILD)
+#define UI_EXPORT
+#endif
+
+#endif  // SERVICES_UI_PUBLIC_CPP_UI_EXPORT_H_