platform-window: Add a PlatformWindowFactory for creating windows.

ui/aura/window_tree_host_ozone.h

 // Copyright 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 UI_AURA_WINDOW_TREE_HOST_OZONE_H_
 #define UI_AURA_WINDOW_TREE_HOST_OZONE_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/events/event_source.h"
 #include "ui/gfx/rect.h"
-#include "ui/platform_window/platform_window_delegate.h"
+#include "ui/platform_window/types/platform_window_delegate.h"
 
 namespace ui {
 class PlatformWindow;
 }
 
 namespace aura {
 
 class AURA_EXPORT WindowTreeHostOzone : public WindowTreeHost,
                                         public ui::EventSource,
                                         public ui::PlatformWindowDelegate {
@@ skipping 25 matching lines @@
   virtual void SetCapture() OVERRIDE;
   virtual void ReleaseCapture() OVERRIDE;
   virtual void PostNativeEvent(const base::NativeEvent& event) OVERRIDE;
   virtual void SetCursorNative(gfx::NativeCursor cursor_type) OVERRIDE;
   virtual void MoveCursorToNative(const gfx::Point& location) OVERRIDE;
   virtual void OnCursorVisibilityChangedNative(bool show) OVERRIDE;
 
   // ui::EventSource overrides.
   virtual ui::EventProcessor* GetEventProcessor() OVERRIDE;
 
+  // The identifier used to create a compositing surface.
+  gfx::AcceleratedWidget widget_;
+
   // Platform-specific part of this WindowTreeHost.
   scoped_ptr<ui::PlatformWindow> platform_window_;
 
-  // The identifier used to create a compositing surface.
-  gfx::AcceleratedWidget widget_;
-
   DISALLOW_COPY_AND_ASSIGN(WindowTreeHostOzone);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_TREE_HOST_OZONE_H_