Beginnings of the script bubble.

chrome/browser/extensions/script_bubble_controller.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_EXTENSIONS_SCRIPT_BUBBLE_CONTROLLER_H_
+#define CHROME_BROWSER_EXTENSIONS_SCRIPT_BUBBLE_CONTROLLER_H_
+
+#include "base/basictypes.h"
+#include "chrome/browser/extensions/tab_helper.h"
+
+namespace extensions {
+
+// Controls the script bubble in the omnibox, which displays information about
+// extensions which are interacting with the current tab.
+class ScriptBubbleController : public TabHelper::ContentScriptObserver {
+ public:
+  explicit ScriptBubbleController(TabHelper* tab_helper);

[Jeffrey Yasskin, 2012/10/02 00:26:31]

Are there lifetime requirements on tab_helper vs *this? If so, document them
here.

[Aaron Boodman, 2012/10/02 01:28:52]

Done.

+
+  // TabHelper::ContentScriptObserver implementation
+  virtual void OnContentScriptsExecuting(
+      const content::WebContents* web_contents,
+      const ExecutingScriptsMap& extension_ids,
+      int32 page_id,
+      const GURL& on_url) OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ScriptBubbleController);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_SCRIPT_BUBBLE_CONTROLLER_H_