Extension Commands changed by the user now take effect immediately.

chrome/browser/ui/gtk/extensions/extension_keybinding_registry_gtk.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 CHROME_BROWSER_UI_GTK_EXTENSIONS_EXTENSION_KEYBINDING_REGISTRY_GTK_H_
 #define CHROME_BROWSER_UI_GTK_EXTENSIONS_EXTENSION_KEYBINDING_REGISTRY_GTK_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 35 matching lines @@
     return shortcut_handling_suspended_;
   }
 
   // Whether this class has any registered keyboard shortcuts that correspond
   // to |event|.
   gboolean HasPriorityHandler(const GdkEventKey* event) const;
 
  protected:
   // Overridden from ExtensionKeybindingRegistry:
   virtual void AddExtensionKeybinding(
-      const extensions::Extension* extension) OVERRIDE;
+      const extensions::Extension* extension,
+      const std::string& command_name) OVERRIDE;
   virtual void RemoveExtensionKeybinding(
-      const extensions::Extension* extension) OVERRIDE;
+      const extensions::Extension* extension,
+      const std::string& command_name) OVERRIDE;
 
  private:
   // The accelerator handler for when the extension command shortcuts are
   // struck.
   CHROMEG_CALLBACK_3(ExtensionKeybindingRegistryGtk, gboolean, OnGtkAccelerator,
                      GtkAccelGroup*, GObject*, guint, GdkModifierType);
 
   // Keeps track of whether shortcut handling is currently suspended. Shortcuts
   // are suspended briefly while capturing which shortcut to assign to an
   // extension command in the Config UI. If handling isn't suspended while
@@ skipping 18 matching lines @@
                     std::pair<std::string, std::string> > EventTargets;
   EventTargets event_targets_;
 
   // The content notification registrar for listening to extension events.
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionKeybindingRegistryGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_EXTENSIONS_EXTENSION_KEYBINDING_REGISTRY_GTK_H_