services/ui: Create a proper component for the client-lib.

services/ui/public/cpp/window_tree_host_factory.h

Index: services/ui/public/cpp/window_tree_host_factory.h
diff --git a/services/ui/public/cpp/window_tree_host_factory.h b/services/ui/public/cpp/window_tree_host_factory.h
index 2f638865b8359fb7fd4cf3e241309767ed0f0f51..a21ece3fd90a9bdc23c5c917487a245cb4ec1d23 100644
--- a/services/ui/public/cpp/window_tree_host_factory.h
+++ b/services/ui/public/cpp/window_tree_host_factory.h
@@ -8,6 +8,7 @@
 #include <memory>
 
 #include "mojo/public/cpp/bindings/binding.h"
+#include "services/ui/public/cpp/ui_export.h"
 #include "services/ui/public/interfaces/window_tree.mojom.h"
 #include "services/ui/public/interfaces/window_tree_host.mojom.h"
 
@@ -23,14 +24,16 @@ class WindowTreeClientDelegate;
 // 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,
-                          WindowTreeClientDelegate* delegate,
-                          mojom::WindowTreeHostPtr* host,
-                          WindowManagerDelegate* window_manager_delegate);
-void CreateWindowTreeHost(shell::Connector* connector,
-                          WindowTreeClientDelegate* delegate,
-                          mojom::WindowTreeHostPtr* host,
-                          WindowManagerDelegate* window_manager_delegate);
+void UI_EXPORT
+CreateWindowTreeHost(mojom::WindowTreeHostFactory* factory,
+                     WindowTreeClientDelegate* delegate,
+                     mojom::WindowTreeHostPtr* host,
+                     WindowManagerDelegate* window_manager_delegate);
+void UI_EXPORT
+CreateWindowTreeHost(shell::Connector* connector,
+                     WindowTreeClientDelegate* delegate,
+                     mojom::WindowTreeHostPtr* host,
+                     WindowManagerDelegate* window_manager_delegate);
 
 }  // namespace ui