Introduce RemoveRowTableModel interface, let GeolocationExceptionsTableModel derive from it.

chrome/browser/remove_rows_table_model.h

+// Copyright (c) 2010 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 CHROME_BROWSER_REMOVE_ROWS_TABLE_MODEL_H_
+#define CHROME_BROWSER_REMOVE_ROWS_TABLE_MODEL_H_
+
+#include <set>
+#include <vector>
+
+#include "app/table_model.h"
+
+// A table model that also supports removing rows. Used for example for the
+// content settings exception dialog for geolocation.
+class RemoveRowsTableModel : public TableModel {
+ public:
+  typedef std::set<size_t> Rows;
+
+  // Returns whether or not the rows can be removed.
+  virtual bool CanRemoveRows(const Rows& rows) const = 0;
+
+  // Remove the rows from the table.
+  virtual void RemoveRows(const Rows& rows) = 0;
+
+  // Removes all the rows.
+  virtual void RemoveAll() = 0;
+};
+
+#endif  // CHROME_BROWSER_REMOVE_ROWS_TABLE_MODEL_H_
+