Remove win8/metro_driver

win8/metro_driver/ime/ime_popup_observer.h

-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef WIN8_METRO_DRIVER_IME_IME_POPUP_OBSERVER_H_
-#define WIN8_METRO_DRIVER_IME_IME_POPUP_OBSERVER_H_
-
-namespace metro_driver {
-
-// An observer interface implemented by objects that want to be informed when
-// an IME shows or hides its popup window.
-class ImePopupObserver {
- public:
-  enum EventType {
-    kPopupShown,
-    kPopupHidden,
-    kPopupUpdated,
-  };
-  virtual ~ImePopupObserver() {}
-
-  // Called whenever an IME's popup window is changed.
-  virtual void OnImePopupChanged(EventType type) = 0;
-};
-
-}  // namespace metro_driver
-
-#endif  // WIN8_METRO_DRIVER_IME_IME_POPUP_OBSERVER_H_