Split user agent code out of the 'glue' target

webkit/user_agent/webkit_user_agent_export.h

Index: webkit/user_agent/webkit_user_agent_export.h
diff --git a/webkit/user_agent/webkit_user_agent_export.h b/webkit/user_agent/webkit_user_agent_export.h
new file mode 100644
index 0000000000000000000000000000000000000000..d72c9f3db84ea7f0bf398a095c949135310f5a80
--- /dev/null
+++ b/webkit/user_agent/webkit_user_agent_export.h
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 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 WEBKIT_USER_AGENT_WEBKIT_USER_AGENT_EXPORT_H_
+#define WEBKIT_USER_AGENT_WEBKIT_USER_AGENT_EXPORT_H_
+
+#if defined(COMPONENT_BUILD)
+#if defined(WIN32)
+
+#if defined(WEBKIT_USER_AGENT_IMPLEMENTATION)
+#define WEBKIT_USER_AGENT_EXPORT __declspec(dllexport)
+#else
+#define WEBKIT_USER_AGENT_EXPORT __declspec(dllimport)
+#endif  // defined(WEBKIT_USER_AGENT_IMPLEMENTATION)
+
+#else // defined(WIN32)
+#if defined(WEBKIT_USER_AGENT_IMPLEMENTATION)
+#define WEBKIT_USER_AGENT_EXPORT __attribute__((visibility("default")))
+#else
+#define WEBKIT_USER_AGENT_EXPORT
+#endif
+#endif
+
+#else // defined(COMPONENT_BUILD)
+#define WEBKIT_USER_AGENT_EXPORT
+#endif
+
+#endif  // WEBKIT_USER_AGENT_WEBKIT_USER_AGENT_EXPORT_H_