Revert of Fix task manager's default sizing.

ui/views/controls/table/table_view.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 UI_VIEWS_CONTROLS_TABLE_TABLE_VIEW_VIEWS_H_
 #define UI_VIEWS_CONTROLS_TABLE_TABLE_VIEW_VIEWS_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 323 matching lines @@
   // TODO(sky): rename to observer_.
   TableViewObserver* table_view_observer_;
 
   // The selection, in terms of the model.
   ui::ListSelectionModel selection_model_;
 
   gfx::FontList font_list_;
 
   int row_height_;
 
-  // The last width for which column sizes were calculated.
-  int last_layout_width_;
+  // Width of the ScrollView last time Layout() was invoked. Used to determine
+  // when we should invoke UpdateVisibleColumnSizes().
+  int last_parent_width_;
+
+  // The width we layout to. This may differ from |last_parent_width_|.
+  int layout_width_;
 
   // Current sort.
   SortDescriptors sort_descriptors_;
 
   // Mappings used when sorted.
   std::vector<int> view_to_model_;
   std::vector<int> model_to_view_;
 
   std::unique_ptr<TableViewRowBackgroundPainter> row_background_painter_;
 
   TableGrouper* grouper_;
 
   // True if in SetVisibleColumnWidth().
   bool in_set_visible_column_width_;
 
   DISALLOW_COPY_AND_ASSIGN(TableView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_TABLE_TABLE_VIEW_VIEWS_H_