Introduce RootWindowHostDelegate. The RootWindowHost performs most of its communication with RootWi…

ui/aura/root_window_host.h

 // Copyright (c) 2012 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_ROOT_WINDOW_HOST_H_
 #define UI_AURA_ROOT_WINDOW_HOST_H_
 
 #include <vector>
 
 #include "base/message_loop.h"
 #include "ui/base/cursor/cursor.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace gfx {
 class Point;
 class Rect;
 class Size;
 }
 
 namespace aura {
 
 class RootWindow;
+class RootWindowHostDelegate;
 
 // RootWindowHost bridges between a native window and the embedded RootWindow.
 // It provides the accelerated widget and maps events from the native os to
 // aura.
 class RootWindowHost {
  public:
   virtual ~RootWindowHost() {}
 
   // Creates a new RootWindowHost. The caller owns the returned value.
-  static RootWindowHost* Create(const gfx::Rect& bounds);
+  static RootWindowHost* Create(RootWindowHostDelegate* delegate,
+                                const gfx::Rect& bounds);
 
   // Returns the actual size of the screen.
   // (gfx::Screen only reports on the virtual desktop exposed by Aura.)
   static gfx::Size GetNativeScreenSize();
 
+  virtual RootWindow* GetRootWindow() = 0;
+
   // Returns the RootWindowHost for the specified accelerated widget, or NULL if
   // there is none associated.
   static RootWindowHost* GetForAcceleratedWidget(
       gfx::AcceleratedWidget accelerated_widget);
 
-  // Sets the RootWindow this RootWindowHost is hosting. RootWindowHost does not
-  // own the RootWindow.
-  virtual void SetRootWindow(RootWindow* root_window) = 0;
-  virtual RootWindow* GetRootWindow() = 0;
-
   // Returns the accelerated widget.
   virtual gfx::AcceleratedWidget GetAcceleratedWidget() = 0;
 
   // Shows the RootWindowHost.
   virtual void Show() = 0;
 
   // Toggles the host's full screen state.
   virtual void ToggleFullScreen() = 0;
 
   // Gets/Sets the size of the RootWindowHost.
@@ skipping 43 matching lines @@
   virtual void PostNativeEvent(const base::NativeEvent& native_event) = 0;
 #endif
 
   // Called when the device scale factor of the root window has chagned.
   virtual void OnDeviceScaleFactorChanged(float device_scale_factor) = 0;
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_ROOT_WINDOW_HOST_H_