Update from chromium 62675d9fb31fb8cedc40f68e78e8445a74f362e7
This is Cr-Commit-Position: refs/heads/master@{#300999}
Review URL: https://codereview.chromium.org/670183003
diff --git a/sandbox/sandbox_export.h b/sandbox/sandbox_export.h
new file mode 100644
index 0000000..40a4036
--- /dev/null
+++ b/sandbox/sandbox_export.h
@@ -0,0 +1,29 @@
+// 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 SANDBOX_SANDBOX_EXPORT_H_
+#define SANDBOX_SANDBOX_EXPORT_H_
+
+#if defined(WIN32)
+#error "sandbox_export.h does not support WIN32."
+#endif
+
+#if defined(COMPONENT_BUILD)
+
+#if defined(SANDBOX_IMPLEMENTATION)
+#define SANDBOX_EXPORT __attribute__((visibility("default")))
+#define SANDBOX_EXPORT_PRIVATE __attribute__((visibility("default")))
+#else
+#define SANDBOX_EXPORT
+#define SANDBOX_EXPORT_PRIVATE
+#endif // defined(SANDBOX_IMPLEMENTATION)
+
+#else // defined(COMPONENT_BUILD)
+
+#define SANDBOX_EXPORT
+#define SANDBOX_EXPORT_PRIVATE
+
+#endif // defined(COMPONENT_BUILD)
+
+#endif // SANDBOX_SANDBOX_EXPORT_H_
