chromeos: Remove ash::SystemTrayDelegate::CreateTrayRotationLock

chrome/browser/ui/ash/system_tray_delegate_chromeos.cc

Index: chrome/browser/ui/ash/system_tray_delegate_chromeos.cc
diff --git a/chrome/browser/ui/ash/system_tray_delegate_chromeos.cc b/chrome/browser/ui/ash/system_tray_delegate_chromeos.cc
index 95591798c1e84c0959c8692c9bb66c218d511bcc..8e19a97e826b14e9f023ede62dfc68daa2938861 100644
--- a/chrome/browser/ui/ash/system_tray_delegate_chromeos.cc
+++ b/chrome/browser/ui/ash/system_tray_delegate_chromeos.cc
@@ -19,7 +19,6 @@
 #include "ash/system/date/clock_observer.h"
 #include "ash/system/ime/ime_observer.h"
 #include "ash/system/power/power_status.h"
-#include "ash/system/rotation/tray_rotation_lock.h"
 #include "ash/system/session/logout_button_observer.h"
 #include "ash/system/tray/system_tray_notifier.h"
 #include "ash/system/tray_accessibility.h"
@@ -294,11 +293,6 @@ bool SystemTrayDelegateChromeOS::IsSearchKeyMappedToCapsLock() {
   return search_key_mapped_to_ == input_method::kCapsLockKey;
 }
 
-std::unique_ptr<ash::SystemTrayItem>
-SystemTrayDelegateChromeOS::CreateRotationLockTrayItem(ash::SystemTray* tray) {
-  return base::MakeUnique<ash::TrayRotationLock>(tray);
-}
-
 ash::SystemTrayNotifier* SystemTrayDelegateChromeOS::GetSystemTrayNotifier() {
   return ash::Shell::Get()->system_tray_notifier();
 }