ozone: Add OzoneWindowFactory & OzoneWindow

ui/aura/window_tree_host_ozone.h

Index: ui/aura/window_tree_host_ozone.h
diff --git a/ui/aura/window_tree_host_ozone.h b/ui/aura/window_tree_host_ozone.h
index 4f4c7093452c87f49d2de5f8f9bde7d0efa8fc87..e13aafe8fcf4b6c16cd2de886e4183bfc1151b54 100644
--- a/ui/aura/window_tree_host_ozone.h
+++ b/ui/aura/window_tree_host_ozone.h
@@ -14,13 +14,17 @@
 #include "ui/gfx/insets.h"
 #include "ui/gfx/rect.h"
 
+namespace ui {
+class OzoneWindow;
+}
+
 namespace aura {
 
 class WindowTreeHostOzone : public WindowTreeHost,
                             public ui::EventSource,
                             public base::MessagePumpDispatcher {
  public:
-  explicit WindowTreeHostOzone(const gfx::Rect& bounds);
+  explicit WindowTreeHostOzone(scoped_ptr<ui::OzoneWindow> ozone_window);
   virtual ~WindowTreeHostOzone();
 
  private:
@@ -52,8 +56,7 @@ class WindowTreeHostOzone : public WindowTreeHost,
   // ui::EventSource overrides.
   virtual ui::EventProcessor* GetEventProcessor() OVERRIDE;
 
-  gfx::AcceleratedWidget widget_;
-  gfx::Rect bounds_;
+  scoped_ptr<ui::OzoneWindow> ozone_window_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowTreeHostOzone);
 };