Split ui/display types into separate module and have Ozone depend on it

ui/ozone/ozone_platform.h

Index: ui/ozone/ozone_platform.h
diff --git a/ui/ozone/ozone_platform.h b/ui/ozone/ozone_platform.h
index 61cd9efb2a204d9c9de2ea5c4c726c3b610467fd..d0aead68f1df8fd1b928e016b3f7eacebbf155fe 100644
--- a/ui/ozone/ozone_platform.h
+++ b/ui/ozone/ozone_platform.h
@@ -6,6 +6,7 @@
 #define UI_OZONE_OZONE_PLATFORM_H_
 
 #include "base/memory/scoped_ptr.h"
+#include "ui/display/types/chromeos/native_display_delegate.h"
 #include "ui/events/ozone/event_factory_ozone.h"
 #include "ui/gfx/ozone/surface_factory_ozone.h"
 #include "ui/ozone/ime/input_method_context_factory_ozone.h"
@@ -38,6 +39,8 @@ class OZONE_EXPORT OzonePlatform {
   // EventFactoryOzone will be set.
   static void Initialize();
 
+  static OzonePlatform* GetInstance();
+
   // Factory getters to override in subclasses. The returned objects will be
   // injected into the appropriate layer at startup. Subclasses should not
   // inject these objects themselves. Ownership is retained by OzonePlatform.
@@ -46,6 +49,7 @@ class OZONE_EXPORT OzonePlatform {
   virtual ui::InputMethodContextFactoryOzone*
       GetInputMethodContextFactoryOzone() = 0;
   virtual ui::CursorFactoryOzone* GetCursorFactoryOzone() = 0;
+  virtual ui::NativeDisplayDelegate* CreateNativeDisplayDelegate() = 0;
 
  private:
   static OzonePlatform* instance_;