Remove ash localization from display_manager.cc

ash/display/window_tree_host_manager.h

Index: ash/display/window_tree_host_manager.h
diff --git a/ash/display/window_tree_host_manager.h b/ash/display/window_tree_host_manager.h
index d896fe892fb0a18079b41c3d2e289d8c1edd3e2d..3169ced8a6b4bb5fcc6b002ea542e848ee7f5631 100644
--- a/ash/display/window_tree_host_manager.h
+++ b/ash/display/window_tree_host_manager.h
@@ -158,7 +158,7 @@ class ASH_EXPORT WindowTreeHostManager
   // aura::WindowTreeHostObserver overrides:
   void OnHostResized(const aura::WindowTreeHost* host) override;
 
-  // aura::DisplayManager::Delegate overrides:
+  // ash::DisplayManager::Delegate overrides:
   void CreateOrUpdateMirroringDisplay(
       const DisplayInfoList& info_list) override;
   void CloseMirroringDisplayIfNotNecessary() override;
@@ -167,6 +167,8 @@ class ASH_EXPORT WindowTreeHostManager
 #if defined(OS_CHROMEOS)
   ui::DisplayConfigurator* display_configurator() override;
 #endif
+  std::string GetInternalDisplayNameString() override;
+  std::string GetUnknownDisplayNameString() override;
 
   // ui::internal::InputMethodDelegate overrides:
   ui::EventDispatchDetails DispatchKeyEventPostIME(