Move //components/ui/zoom to top-level under //components

components/ui/zoom/zoom_observer.h

-// Copyright (c) 2012 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 COMPONENTS_UI_ZOOM_ZOOM_OBSERVER_H_
-#define COMPONENTS_UI_ZOOM_ZOOM_OBSERVER_H_
-
-#include "components/ui/zoom/zoom_controller.h"
-
-namespace ui_zoom {
-
-// Interface for objects that wish to be notified of changes in ZoomController.
-class ZoomObserver {
- public:
-  // Notification that the zoom percentage has changed.
-  virtual void OnZoomChanged(const ZoomController::ZoomChangedEventData& data) {
-  }
-
- protected:
-  virtual ~ZoomObserver() {}
-};
-
-}  // namespace ui_zoom
-
-#endif  // COMPONENTS_UI_ZOOM_ZOOM_OBSERVER_H_