Tab dragging as implemented as a mus API.

components/mus/demo/mus_demo.h

 // Copyright 2016 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_DEMO_MUS_DEMO_H_
 #define COMPONENTS_MUS_DEMO_MUS_DEMO_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 42 matching lines @@
       mus::Window* window,
       const std::string& name,
       std::unique_ptr<std::vector<uint8_t>>* new_data) override;
   mus::Window* OnWmCreateTopLevelWindow(
       std::map<std::string, std::vector<uint8_t>>* properties) override;
   void OnWmClientJankinessChanged(const std::set<mus::Window*>& client_windows,
                                   bool janky) override;
   void OnWmNewDisplay(mus::Window* window,
                       const display::Display& display) override;
   void OnAccelerator(uint32_t id, const ui::Event& event) override;
+  void OnWmPerformMoveLoop(uint32_t change_id,
+                           uint32_t window_id,
+                           const gfx::Point& cursor_location) override;
+  void OnWmCancelMoveLoop(uint32_t window_id) override;
 
   // Allocate a bitmap the same size as the window to draw into.
   void AllocBitmap();
 
   // Draws one frame, incrementing the rotation angle.
   void DrawFrame();
 
   shell::Connector* connector_ = nullptr;
 
   mus::Window* window_ = nullptr;
@@ skipping 10 matching lines @@
 
   // Current rotation angle for drawing.
   double angle_ = 0.0;
 
   DISALLOW_COPY_AND_ASSIGN(MusDemo);
 };
 
 }  // namespace mus_demo
 
 #endif  // COMPONENTS_MUS_DEMO_MUS_DEMO_H_