chromeos: Remove the last IME methods from ash::SystemTrayDelegate

ash/system/tray/system_tray_delegate.h

Index: ash/system/tray/system_tray_delegate.h
diff --git a/ash/system/tray/system_tray_delegate.h b/ash/system/tray/system_tray_delegate.h
index 45d701d097410da87d4e7493cf322347f6facfe6..94ebbfc95d8490fbc3354a643f0fb851955edfa4 100644
--- a/ash/system/tray/system_tray_delegate.h
+++ b/ash/system/tray/system_tray_delegate.h
@@ -5,9 +5,6 @@
 #ifndef ASH_SYSTEM_TRAY_SYSTEM_TRAY_DELEGATE_H_
 #define ASH_SYSTEM_TRAY_SYSTEM_TRAY_DELEGATE_H_
 
-#include <string>
-#include <vector>
-
 #include "ash/ash_export.h"
 #include "base/i18n/time_formatting.h"
 #include "base/strings/string16.h"
@@ -18,11 +15,6 @@ class TimeTicks;
 }
 
 namespace ash {
-struct IMEInfo;
-struct IMEPropertyInfo;
-
-using IMEInfoList = std::vector<IMEInfo>;
-using IMEPropertyInfoList = std::vector<IMEPropertyInfo>;
 
 class NetworkingConfigDelegate;
 
@@ -44,15 +36,6 @@ class ASH_EXPORT SystemTrayDelegate {
   // Shows login UI to add other users to this session.
   virtual void ShowUserLogin();
 
-  // Returns the currently selected IME.
-  virtual void GetCurrentIME(IMEInfo* info);
-
-  // Returns a list of availble IMEs.
-  virtual void GetAvailableIMEList(IMEInfoList* list);
-
-  // Returns a list of properties for the currently selected IME.
-  virtual void GetCurrentIMEProperties(IMEPropertyInfoList* list);
-
   // Returns NetworkingConfigDelegate. May return nullptr.
   virtual NetworkingConfigDelegate* GetNetworkingConfigDelegate() const;