Make aura work with mus

ui/aura/mus/window_tree_client_delegate.h

Index: ui/aura/mus/window_tree_client_delegate.h
diff --git a/services/ui/public/cpp/window_tree_client_delegate.h b/ui/aura/mus/window_tree_client_delegate.h
similarity index 70%
copy from services/ui/public/cpp/window_tree_client_delegate.h
copy to ui/aura/mus/window_tree_client_delegate.h
index 3664ac282dcf6ba728163671e8c6d528f859e7f5..9c3a16288c646da7f8cd45337133ec5a06eacf75 100644
--- a/services/ui/public/cpp/window_tree_client_delegate.h
+++ b/ui/aura/mus/window_tree_client_delegate.h
@@ -2,25 +2,34 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef SERVICES_UI_PUBLIC_CPP_WINDOW_TREE_CLIENT_DELEGATE_H_
-#define SERVICES_UI_PUBLIC_CPP_WINDOW_TREE_CLIENT_DELEGATE_H_
+#ifndef UI_AURA_MUS_WINDOW_TREE_CLIENT_DELEGATE_H_
+#define UI_AURA_MUS_WINDOW_TREE_CLIENT_DELEGATE_H_
 
+#include <memory>
 #include <string>
 
 #include "services/service_manager/public/interfaces/interface_provider.mojom.h"
 #include "services/ui/public/interfaces/window_tree.mojom.h"
+#include "ui/aura/aura_export.h"
 
 namespace ui {
 class Event;
 }
 
-namespace ui {
+namespace aura {
 
+class PropertyConverter;
 class Window;
+class WindowPortMus;
 class WindowTreeClient;
 
+namespace client {
+class CaptureClient;
+class FocusClient;
+}
+
 // Interface implemented by an application using mus.
-class WindowTreeClientDelegate {
+class AURA_EXPORT WindowTreeClientDelegate {
  public:
   // Called when the application implementing this interface is embedded at
   // |root|.
@@ -52,10 +61,20 @@ class WindowTreeClientDelegate {
   virtual void OnPointerEventObserved(const ui::PointerEvent& event,
                                       Window* target) = 0;
 
+  // Mus expects a single FocusClient is used for all WindowTreeHosts. This
+  // returns it. GetFocusClient() is called from the constructor.
+  virtual client::FocusClient* GetFocusClient() = 0;
+
+  // Mus expects a single CaptureClient is used for all WindowTreeHosts. This
+  // returns it. GetCaptureClient() is called from the constructor.
+  virtual client::CaptureClient* GetCaptureClient() = 0;
+
+  virtual PropertyConverter* GetPropertyConverter() = 0;
+
  protected:
   virtual ~WindowTreeClientDelegate() {}
 };
 
-}  // namespace ui
+}  // namespace aura
 
-#endif  // SERVICES_UI_PUBLIC_CPP_WINDOW_TREE_CLIENT_DELEGATE_H_
+#endif  // UI_AURA_MUS_WINDOW_TREE_CLIENT_DELEGATE_H_