Revert: Remove WindowTreeClientDelegate::GetCaptureClient() and WindowTreeClient::GetCaptureClient()

ui/aura/mus/window_tree_client.h

 // Copyright 2014 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 UI_AURA_MUS_WINDOW_TREE_CLIENT_H_
 #define UI_AURA_MUS_WINDOW_TREE_CLIENT_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 50 matching lines @@
 class InFlightVisibleChange;
 class MusContextFactory;
 class WindowMus;
 class WindowPortMus;
 class WindowTreeClientDelegate;
 class WindowTreeClientPrivate;
 class WindowTreeClientObserver;
 class WindowTreeClientTestObserver;
 class WindowTreeHostMus;
 
+namespace client {
+class CaptureClient;
+}
+
 using EventResultCallback = base::Callback<void(ui::mojom::EventResult)>;
 
 // Manages the connection with mus.
 //
 // WindowTreeClient is owned by the creator. Generally when the delegate gets
 // one of OnEmbedRootDestroyed() or OnLostConnection() it should delete the
 // WindowTreeClient.
 //
 // When WindowTreeClient is deleted all windows are deleted (and observers
 // notified).
@@ skipping 23 matching lines @@
 
   service_manager::Connector* connector() { return connector_; }
   ui::Gpu* gpu() { return gpu_.get(); }
   CaptureSynchronizer* capture_synchronizer() {
     return capture_synchronizer_.get();
   }
 
   bool connected() const { return tree_ != nullptr; }
   ClientSpecificId client_id() const { return client_id_; }
 
+  client::CaptureClient* GetCaptureClient();
+
   void SetCanFocus(Window* window, bool can_focus);
   void SetCanAcceptDrops(Id window_id, bool can_accept_drops);
   void SetEventTargetingPolicy(WindowMus* window,
                                ui::mojom::EventTargetingPolicy policy);
   void SetPredefinedCursor(WindowMus* window,
                            ui::mojom::Cursor old_cursor,
                            ui::mojom::Cursor new_cursor);
   void SetWindowTextInputState(WindowMus* window,
                                mojo::TextInputStatePtr state);
   void SetImeVisibility(WindowMus* window,
@@ skipping 418 matching lines @@
   std::unique_ptr<ui::Gpu> gpu_;
   std::unique_ptr<MusContextFactory> compositor_context_factory_;
   base::WeakPtrFactory<WindowTreeClient> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowTreeClient);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_MUS_WINDOW_TREE_CLIENT_H_