Adds couple of functions to WindowManagerDelegate:

ui/aura/mus/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 UI_AURA_MUS_WINDOW_MANAGER_DELEGATE_H_
 #define UI_AURA_MUS_WINDOW_MANAGER_DELEGATE_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 42 matching lines @@
                               const base::Callback<void(bool)>& callback) = 0;
   virtual void RemoveAccelerator(uint32_t id) = 0;
   virtual void AddActivationParent(Window* window) = 0;
   virtual void RemoveActivationParent(Window* window) = 0;
   virtual void ActivateNextWindow() = 0;
   virtual void SetUnderlaySurfaceOffsetAndExtendedHitArea(
       Window* window,
       const gfx::Vector2d& offset,
       const gfx::Insets& hit_area) = 0;
 
+  // Requests the client embedded in |window| to close the window. Only
+  // applicable to top-level windows. If a client is not embedded in |window|,
+  // this does nothing.
+  virtual void RequestClose(Window* window) = 0;
+
  protected:
   virtual ~WindowManagerClient() {}
 };
 
 // Used by clients implementing a window manager.
 // TODO(sky): this should be called WindowManager, but that's rather confusing
 // currently.
 class AURA_EXPORT WindowManagerDelegate {
  public:
   // Called once to give the delegate access to functions only exposed to
@@ skipping 27 matching lines @@
   virtual Window* OnWmCreateTopLevelWindow(
       ui::mojom::WindowType window_type,
       std::map<std::string, std::vector<uint8_t>>* properties) = 0;
 
   // Called when a Mus client's jankiness changes. |windows| is the set of
   // windows owned by the window manager in which the client is embedded.
   virtual void OnWmClientJankinessChanged(
       const std::set<Window*>& client_windows,
       bool janky) = 0;
 
+  // When a new display is added OnWmWillCreateDisplay() is called, and then
+  // OnWmNewDisplay(). OnWmWillCreateDisplay() is intended to add the display
+  // to the set of displays (see Screen).
+  virtual void OnWmWillCreateDisplay(const display::Display& display) = 0;
+
+  // Called when a WindowTreeHostMus is created for a new display
   // Called when a display is added. |window_tree_host| is the WindowTreeHost
   // for the new display.
   virtual void OnWmNewDisplay(
       std::unique_ptr<WindowTreeHostMus> window_tree_host,
       const display::Display& display) = 0;
 
   // Called when a display is removed. |window_tree_host| is the WindowTreeHost
   // for the display.
   virtual void OnWmDisplayRemoved(WindowTreeHostMus* window_tree_host) = 0;
 
   // Called when a display is modified.
   virtual void OnWmDisplayModified(const display::Display& display) = 0;
 
   virtual ui::mojom::EventResult OnAccelerator(uint32_t id,
                                                const ui::Event& event);
 
   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;
 
+  // Called when then client changes the client area of a window.
+  virtual void OnWmSetClientArea(
+      Window* window,
+      const gfx::Insets& insets,
+      const std::vector<gfx::Rect>& additional_client_areas) = 0;
+
  protected:
   virtual ~WindowManagerDelegate() {}
 };
 
 }  // namespace ui
 
 #endif  // UI_AURA_MUS_WINDOW_MANAGER_DELEGATE_H_