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

chrome/browser/ui/webui/extensions/extension_commands_handler.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_WEBUI_EXTENSIONS_EXTENSION_COMMANDS_HANDLER_H_
+#define CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_COMMANDS_HANDLER_H_
+#pragma once
+
+#include "base/compiler_specific.h"
+#include "content/public/browser/web_ui_message_handler.h"
+
+namespace base {
+class DictionaryValue;
+class ListValue;
+}
+
+// The handler page for the Extension Commands UI overlay.
+class ExtensionCommandsHandler : public content::WebUIMessageHandler {
+ public:
+  ExtensionCommandsHandler();
+  virtual ~ExtensionCommandsHandler();
+
+  // Fetches the localized values for the page and deposits them into
+  // |localized_strings|.
+  void GetLocalizedValues(base::DictionaryValue* localized_strings);
+
+  // WebUIMessageHandler implementation.
+  virtual void RegisterMessages() OVERRIDE;
+
+ private:
+  // Handles requests from javascript to fetch the extensions data, including
+  // the commands it contains.
+  // Replies back through: ExtensionCommandsOverlay.returnExtensionsData.
+  void HandleRequestExtensionsData(const base::ListValue* args);
+
+  DISALLOW_COPY_AND_ASSIGN(ExtensionCommandsHandler);
+};
+
+#endif  // CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_COMMANDS_HANDLER_H_