Index: underlay_opengl_hosting_window.h
===================================================================
--- underlay_opengl_hosting_window.h	(revision 214871)
+++ underlay_opengl_hosting_window.h	(working copy)
@@ -12,7 +12,7 @@
 // Common base class for windows that host a OpenGL surface that renders under
 // the window. Contains methods relating to hole punching so that the OpenGL
 // surface is visible through the window.
-UI_EXPORT
+__attribute__((visibility("default")))
 @interface UnderlayOpenGLHostingWindow : NSWindow
 @end