Revert of Updates the IME list when the IME has refreshed.

ash/test/test_system_tray_delegate.h

Index: ash/test/test_system_tray_delegate.h
diff --git a/ash/test/test_system_tray_delegate.h b/ash/test/test_system_tray_delegate.h
index 8371845bebf158c51fc599e69f89228ae1a71dc0..57ab96a3ffd52f3219524ec2bfb390f31718e5a2 100644
--- a/ash/test/test_system_tray_delegate.h
+++ b/ash/test/test_system_tray_delegate.h
@@ -51,9 +51,6 @@
   // Sets the IME info.
   void SetCurrentIME(const IMEInfo& info);
 
-  // Sets the list of available IMEs.
-  void SetAvailableIMEList(const IMEInfoList& list);
-
   // Overridden from SystemTrayDelegate:
   LoginStatus GetUserLoginStatus() const override;
   bool IsUserSupervised() const override;
@@ -67,7 +64,6 @@
   std::unique_ptr<SystemTrayItem> CreateRotationLockTrayItem(
       SystemTray* tray) override;
   void GetCurrentIME(IMEInfo* info) override;
-  void GetAvailableIMEList(IMEInfoList* list) override;
 
  private:
   bool should_show_display_notification_;
@@ -75,7 +71,6 @@
   base::TimeDelta session_length_limit_;
   bool session_length_limit_set_;
   IMEInfo current_ime_;
-  IMEInfoList ime_list_;
 
   DISALLOW_COPY_AND_ASSIGN(TestSystemTrayDelegate);
 };