This adds a webui overlay on the extensions page for showing what Extension keybindings are active.…

chrome/common/extensions/extension_commands.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_COMMON_EXTENSIONS_EXTENSION_COMMANDS_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_COMMANDS_H_
 #pragma once
 
 #include <string>
 #include <map>
 
 #include "base/string16.h"
 #include "ui/base/accelerators/accelerator.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace extensions {
+class Extension;
+}
+
+namespace extensions {
 
 class Command {
  public:
   // Define out of line constructor/destructor to please Clang.
   Command();
   ~Command();
 
   // The platform value for the Command.
   static std::string CommandPlatform();
 
   // Parse the command.
   bool Parse(base::DictionaryValue* command,
              const std::string& command_name,
              int index,
              string16* error);
 
+  // Convert a Command object from |extension| to a DictionaryValue.
+  // |active| specifies whether the command is active or not.
+  base::DictionaryValue* ToValue(
+      const Extension* extension, bool active) const;
+
   // Accessors:
   const std::string& command_name() const { return command_name_; }
   const ui::Accelerator& accelerator() const { return accelerator_; }
-  const std::string& description() const { return description_; }
+  const string16& description() const { return description_; }
 
  private:
   ui::Accelerator ParseImpl(const std::string& shortcut,
                             const std::string& platform_key,
                             int index,
                             string16* error);
   std::string command_name_;
   ui::Accelerator accelerator_;
-  std::string description_;
+  string16 description_;
 };
 
 // A mapping of command name (std::string) to a command object.
 typedef std::map<std::string, Command> CommandMap;
 
 }  // namespace extensions
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_COMMANDS_H_