Tab dragging as implemented as a mus API.

services/ui/public/cpp/window_manager_delegate.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 SERVICES_UI_PUBLIC_CPP_WINDOW_MANAGER_DELEGATE_H_
 #define SERVICES_UI_PUBLIC_CPP_WINDOW_MANAGER_DELEGATE_H_
 
 #include <stdint.h>
 
 #include <map>
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "services/ui/public/interfaces/cursor.mojom.h"
 #include "services/ui/public/interfaces/event_matcher.mojom.h"
 #include "services/ui/public/interfaces/window_manager_constants.mojom.h"
+#include "services/ui/public/interfaces/window_tree_constants.mojom.h"
 #include "ui/events/mojo/event.mojom.h"
 
 namespace display {
 class Display;
 }
 
 namespace gfx {
 class Insets;
 class Rect;
 class Vector2d;
@@ skipping 71 matching lines @@
       const std::set<Window*>& client_windows,
       bool janky) = 0;
 
   // Called when a display is added. |window| is the root of the window tree for
   // the specified display.
   virtual void OnWmNewDisplay(Window* window,
                               const display::Display& display) = 0;
 
   virtual void OnAccelerator(uint32_t id, const ui::Event& event) = 0;
 
+  virtual void OnWmPerformMoveLoop(
+      Window* window,
+      ui::mojom::MoveLoopSource source,
+      const gfx::Point& cursor_location,
+      const base::Callback<void(bool)>& on_done) = 0;
+
+  virtual void OnWmCancelMoveLoop(Window* window) = 0;
+
  protected:
   virtual ~WindowManagerDelegate() {}
 };
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_PUBLIC_CPP_WINDOW_MANAGER_DELEGATE_H_