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

ui/ozone/platform/caca/ozone_platform_caca.cc

Index: ui/ozone/platform/caca/ozone_platform_caca.cc
diff --git a/ui/ozone/platform/caca/ozone_platform_caca.cc b/ui/ozone/platform/caca/ozone_platform_caca.cc
index dfe67acb5683869ef49aef483aa1617f5533af41..653502263aba2abd88d7b4d53d889a8686b11181 100644
--- a/ui/ozone/platform/caca/ozone_platform_caca.cc
+++ b/ui/ozone/platform/caca/ozone_platform_caca.cc
@@ -7,6 +7,10 @@
 #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()
@@ -33,6 +37,14 @@ 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