Move TableModel out of views/ and into app/....

views/controls/table/table_model_observer.h

-// Copyright (c) 2009 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 VIEWS_CONTROL_TABLE_TABLE_MODEL_OBSERVER_H_
-#define VIEWS_CONTROL_TABLE_TABLE_MODEL_OBSERVER_H_
-
-namespace views {
-
-// Observer for a TableModel. Anytime the model changes, it must notify its
-// observer.
-class TableModelObserver {
- public:
-  // Invoked when the model has been completely changed.
-  virtual void OnModelChanged() = 0;
-
-  // Invoked when a range of items has changed.
-  virtual void OnItemsChanged(int start, int length) = 0;
-
-  // Invoked when new items are added.
-  virtual void OnItemsAdded(int start, int length) = 0;
-
-  // Invoked when a range of items has been removed.
-  virtual void OnItemsRemoved(int start, int length) = 0;
-};
-
-}  // namespace views
-
-#endif  // VIEWS_CONTROL_TABLE_TABLE_MODEL_OBSERVER_H_