platform-window: Add a PlatformWindowFactory for creating windows.

ui/aura/window_tree_host_ozone.cc

 // 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.
 
 #include "ui/aura/window_tree_host_ozone.h"
 
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/ozone/public/cursor_factory_ozone.h"
 #include "ui/ozone/public/event_factory_ozone.h"
-#include "ui/ozone/public/ozone_platform.h"
-#include "ui/platform_window/platform_window.h"
+#include "ui/platform_window/platform_window_factory.h"
+#include "ui/platform_window/types/platform_window.h"
 
 namespace aura {
 
 WindowTreeHostOzone::WindowTreeHostOzone(const gfx::Rect& bounds)
-    : widget_(gfx::kNullAcceleratedWidget) {
-  platform_window_ =
-      ui::OzonePlatform::GetInstance()->CreatePlatformWindow(this, bounds);
+    : widget_(gfx::kNullAcceleratedWidget),
+      platform_window_(ui::PlatformWindowFactory::GetInstance()
+                           ->CreatePlatformWindow(this, bounds)) {
 }
 
 WindowTreeHostOzone::~WindowTreeHostOzone() {
   DestroyCompositor();
   DestroyDispatcher();
 }
 
 void WindowTreeHostOzone::OnBoundsChanged(const gfx::Rect& new_bounds) {
   // TOOD(spang): Should we determine which parts changed?
   OnHostResized(new_bounds.size());
@@ skipping 94 matching lines @@
   return new WindowTreeHostOzone(bounds);
 }
 
 // static
 gfx::Size WindowTreeHost::GetNativeScreenSize() {
   NOTIMPLEMENTED();
   return gfx::Size();
 }
 
 }  // namespace aura