Dynamically calculate the number of extension icons to show per row in overflow

ui/views/controls/menu/menu_item_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_MENU_MENU_ITEM_VIEW_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_ITEM_VIEW_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 247 matching lines @@
 
   // Returns the command id of this item.
   int GetCommand() const { return command_; }
 
   // Paints the menu item.
   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
 
   // Returns the preferred size of this item.
   virtual gfx::Size GetPreferredSize() const OVERRIDE;
 
+  // Gets the preferred height for the given |width|. This is only different
+  // from GetPreferredSize().width() if the item has a child view with flexible
+  // dimensions.
+  virtual int GetHeightForWidth(int width) const OVERRIDE;
+
   // Return the preferred dimensions of the item in pixel.
   const MenuItemDimensions& GetDimensions() const;
 
   // Returns the object responsible for controlling showing the menu.
   MenuController* GetMenuController();
   const MenuController* GetMenuController() const;
 
   // Returns the delegate. This returns the delegate of the root menu item.
   MenuDelegate* GetDelegate();
   const MenuDelegate* GetDelegate() const;
@@ skipping 233 matching lines @@
   // If set to false, the right margin will be removed for menu lines
   // containing other elements.
   bool use_right_margin_;
 
   DISALLOW_COPY_AND_ASSIGN(MenuItemView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_MENU_MENU_ITEM_VIEW_H_