 Export libgtkui symbols for the GN component build.
 
 diff --git a/chrome/browser/ui/libgtkui/gtk_util.h b/chrome/browser/ui/libgtkui/gtk_util.h
-index 1efb064df26488d9d893e1e58cb17110c10501f3..bb1aea692a356c206baf2750ed4c98fa86d39fb9 100644
+index 1efb064df26488d9d893e1e58cb17110c10501f3..f89015361652803962d1b4198848fb24573beae5 100644
 --- a/chrome/browser/ui/libgtkui/gtk_util.h
 +++ b/chrome/browser/ui/libgtkui/gtk_util.h
 @@ -11,6 +11,7 @@

 
 ScopedCssProvider GetCssProvider(const std::string& css);
 
@@ -193,7 +194,7 @@ void RenderBackground(const gfx::Size& size,
 // Renders a background from the style context created by
 // GetStyleContextFromCss(|css_selector|) into a 24x24 bitmap and
 // returns the average color.

-void SetGtkTransientForAura(GtkWidget* dialog, aura::Window* parent);
+LIBGTKUI_EXPORT void SetGtkTransientForAura(GtkWidget* dialog, aura::Window* parent);
 
 // Parses |button_string| into |leading_buttons| and
 // |trailing_buttons|.  The string is of the format
@@ -173,7 +174,7 @@ void ApplyCssToContext(GtkStyleContext* context, const std::string& css);
 
 // Get the 'color' property from the style context created by
 // GetStyleContextFromCss(|css_selector|).
