Add set_autohide_systemui to wayland protocol

components/exo/shell_surface.h

Index: components/exo/shell_surface.h
diff --git a/components/exo/shell_surface.h b/components/exo/shell_surface.h
index c22947d2e6947fd476eddfa24d8ef9b4e3b167ea..dda864feac00961513b97c91305c881cfc0b1cbc 100644
--- a/components/exo/shell_surface.h
+++ b/components/exo/shell_surface.h
@@ -132,6 +132,9 @@ class ShellSurface : public SurfaceDelegate,
   // Pins the shell surface. |trusted| flag is ignored when |pinned| is false.
   void SetPinned(bool pinned, bool trusted);
 
+  // Sets whether or not the shell surface should autohide the shelf.
+  void SetAutohideShelf(uint32_t autohide);
+
   // Set title for surface.
   void SetTitle(const base::string16& title);