Show an extension info bubble when a script badge is clicked.

chrome/browser/ui/webui/extensions/extension_info_ui.h

Index: chrome/browser/ui/webui/extensions/extension_info_ui.h
diff --git a/chrome/browser/ui/webui/extensions/extension_info_ui.h b/chrome/browser/ui/webui/extensions/extension_info_ui.h
new file mode 100644
index 0000000000000000000000000000000000000000..524384719429b3269363b86796318c1844011941
--- /dev/null
+++ b/chrome/browser/ui/webui/extensions/extension_info_ui.h
@@ -0,0 +1,38 @@
+// 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_INFO_UI_H_
+#define CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_INFO_UI_H_
+#pragma once
+
+#include "content/public/browser/web_ui_controller.h"
+
+namespace base {
+class ListValue;
+}
+
+namespace extensions {
+class Extension;
+}
+
+// WebUI controller for the informative bubble shown on clicking a script badge.
+class ExtensionInfoUI : public content::WebUIController {
+ public:
+  explicit ExtensionInfoUI(content::WebUI* web_ui);
+
+  // Returns the chrome://extension-info/ URL for this extension.
+  static GURL GetURL(const std::string& extension_id);
+
+ private:
+  virtual ~ExtensionInfoUI();
+
+  // Callback for "requestExtensionInfo" message.
+  void HandleRequestExtensionInfo(const base::ListValue* args);
+
+  const extensions::Extension* extension_;
+
+  DISALLOW_COPY_AND_ASSIGN(ExtensionInfoUI);
+};
+
+#endif  // CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_INFO_UI_H_