GTK: Set the back/forward and bookmark bar menus to always show their images....

chrome/browser/gtk/menu_gtk.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 CHROME_BROWSER_GTK_MENU_GTK_H_
 #define CHROME_BROWSER_GTK_MENU_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include <string>
@@ skipping 25 matching lines @@
     // ExecuteCommand if the user clicks an item, but will also be called when
     // the user clicks away from the menu.
     virtual void StoppedShowing() { };
 
     // Functions needed for creation of non-static menus.
     virtual int GetItemCount() const { return 0; }
     virtual bool IsItemSeparator(int command_id) const { return false; }
     virtual std::string GetLabel(int command_id) const { return std::string(); }
     virtual bool HasIcon(int command_id) const { return false; }
     virtual const SkBitmap* GetIcon(int command_id) const { return NULL; }
+    // Return true if we should override the "gtk-menu-images" system setting
+    // when showing image menu items for this menu.
+    virtual bool AlwaysShowImages() const { return false; }
   };
 
   // Builds a MenuGtk that uses |delegate| to perform actions and |menu_data|
   // to create the menu.
   MenuGtk(MenuGtk::Delegate* delegate, const MenuCreateMaterial* menu_data,
           GtkAccelGroup* accel_group);
   // Creates a MenuGtk that uses |delegate| to perform actions.  Builds the
   // menu using |delegate| if |load| is true.
   MenuGtk(MenuGtk::Delegate* delegate, bool load);
   ~MenuGtk();
@@ skipping 88 matching lines @@
 
   // True when we should ignore "activate" signals.  Used to prevent
   // menu items from getting activated when we are setting up the
   // menu.
   static bool block_activation_;
 
   ScopedRunnableMethodFactory<MenuGtk> factory_;
 };
 
 #endif  // CHROME_BROWSER_GTK_MENU_GTK_H_