Unified Desktop: hook up ash to allow unified desktop mode

ash/display/mirror_window_controller.h

 // Copyright (c) 2013 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 ASH_DISPLAY_MIRROR_WINDOW_CONTROLLER_H_
 #define ASH_DISPLAY_MIRROR_WINDOW_CONTROLLER_H_
 
+#include <map>
+#include <vector>
+
 #include "ash/ash_export.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/aura/window_tree_host_observer.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace aura {
 class Window;
@@ skipping 15 matching lines @@
 // An object that copies the content of the primary root window to a
 // mirror window. This also draws a mouse cursor as the mouse cursor
 // is typically drawn by the window system.
 class ASH_EXPORT MirrorWindowController : public aura::WindowTreeHostObserver {
  public:
   MirrorWindowController();
   ~MirrorWindowController() override;
 
   // Updates the root window's bounds using |display_info|.
   // Creates the new root window if one doesn't exist.
-  void UpdateWindow(const DisplayInfo& display_info);
+  void UpdateWindow(const std::vector<DisplayInfo>& display_info);
 
   // Same as above, but using existing display info
   // for the mirrored display.
   void UpdateWindow();
 
   // Close the mirror window.
   void Close();
 
   // aura::WindowTreeHostObserver overrides:
   void OnHostResized(const aura::WindowTreeHost* host) override;
 
   // Return the root window used to mirror the content. NULL if the
   // display is not mirrored by the compositor path.
   aura::Window* GetWindow();
 
  private:
   friend class test::MirrorWindowTestApi;
 
+  struct MirroringHostInfo {
+    MirroringHostInfo();
+    ~MirroringHostInfo();
+    scoped_ptr<AshWindowTreeHost> ash_host;
+    gfx::Size mirror_window_host_size;
+    aura::Window* mirror_window = nullptr;
+  };
+
+  void CloseHost(MirroringHostInfo* host_info);
+
   // Creates a RootWindowTransformer for current display
   // configuration.
   scoped_ptr<RootWindowTransformer> CreateRootWindowTransformer() const;
 
-  scoped_ptr<AshWindowTreeHost> ash_host_;
-  gfx::Size mirror_window_host_size_;
+  typedef std::map<int64_t, MirroringHostInfo*> MirroringHostInfoMap;
+  MirroringHostInfoMap mirroring_host_info_map_;
+
   scoped_ptr<ui::Reflector> reflector_;
 
   DISALLOW_COPY_AND_ASSIGN(MirrorWindowController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_DISPLAY_MIRROR_WINDOW_CONTROLLER_H_