Impl mus::mojom::GpuService to enable using Chrome IPC version gpu CmdBuf in mus

components/mus/public/cpp/window_tree_host_factory.h

 // Copyright 2015 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 COMPONENTS_MUS_PUBLIC_CPP_WINDOW_TREE_HOST_FACTORY_H_
 #define COMPONENTS_MUS_PUBLIC_CPP_WINDOW_TREE_HOST_FACTORY_H_
 
 #include <memory>
 
+#include "components/mus/public/cpp/mus_public_export.h"
 #include "components/mus/public/interfaces/window_tree.mojom.h"
 #include "components/mus/public/interfaces/window_tree_host.mojom.h"
 #include "mojo/public/cpp/bindings/binding.h"
 
 namespace shell {
 class Connector;
 }
 
 namespace mus {
 
 class WindowManagerDelegate;
 class WindowTreeDelegate;
 
 // The following create a new window tree host. Supply a |factory| if you have
 // already connected to mus, otherwise supply |shell|, which contacts mus and
 // obtains a WindowTreeHostFactory.
-void CreateWindowTreeHost(mojom::WindowTreeHostFactory* factory,
-                          WindowTreeDelegate* delegate,
-                          mojom::WindowTreeHostPtr* host,
-                          WindowManagerDelegate* window_manager_delegate);
-void CreateWindowTreeHost(shell::Connector* connector,
-                          WindowTreeDelegate* delegate,
-                          mojom::WindowTreeHostPtr* host,
-                          WindowManagerDelegate* window_manager_delegate);
+void MUS_PUBLIC_EXPORT
+CreateWindowTreeHost(mojom::WindowTreeHostFactory* factory,
+                     WindowTreeDelegate* delegate,
+                     mojom::WindowTreeHostPtr* host,
+                     WindowManagerDelegate* window_manager_delegate);
+void MUS_PUBLIC_EXPORT
+CreateWindowTreeHost(shell::Connector* connector,
+                     WindowTreeDelegate* delegate,
+                     mojom::WindowTreeHostPtr* host,
+                     WindowManagerDelegate* window_manager_delegate);
 
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_PUBLIC_CPP_WINDOW_TREE_HOST_FACTORY_H_