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

ui/ozone/platform/caca/ozone_platform_caca.cc

 // Copyright 2014 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/ozone/platform/caca/ozone_platform_caca.h"
 
 #include "ui/ozone/ozone_platform.h"
 #include "ui/ozone/platform/caca/caca_connection.h"
 
+#if defined(OS_CHROMEOS)
+#include "ui/ozone/common/chromeos/native_display_delegate_ozone.h"
+#endif
+
 namespace ui {
 
 OzonePlatformCaca::OzonePlatformCaca()
     : connection_(),
       surface_factory_ozone_(&connection_),
       event_factory_ozone_(&connection_) {}
 
 OzonePlatformCaca::~OzonePlatformCaca() {}
 
 gfx::SurfaceFactoryOzone* OzonePlatformCaca::GetSurfaceFactoryOzone() {
   return &surface_factory_ozone_;
 }
 
 ui::EventFactoryOzone* OzonePlatformCaca::GetEventFactoryOzone() {
   return &event_factory_ozone_;
 }
 
 ui::InputMethodContextFactoryOzone*
 OzonePlatformCaca::GetInputMethodContextFactoryOzone() {
   return &input_method_context_factory_ozone_;
 }
 
 ui::CursorFactoryOzone* OzonePlatformCaca::GetCursorFactoryOzone() {
   return &cursor_factory_ozone_;
 }
 
+ui::NativeDisplayDelegate* OzonePlatformCaca::CreateNativeDisplayDelegate() {
+#if defined(OS_CHROMEOS)
+  return new NativeDisplayDelegateOzone();
+#else
+  return NULL;
+#endif
+}
+
 OzonePlatform* CreateOzonePlatformCaca() { return new OzonePlatformCaca; }
 
 }  // namespace ui