Remove chrome::NOTIFICATION_WEB_DIALOG_SHOWN.

chrome/browser/ui/webui/web_dialog_observer.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_WEB_DIALOG_OBSERVER_H_
+#define CHROME_BROWSER_UI_WEBUI_WEB_DIALOG_OBSERVER_H_
+#pragma once
+
+namespace content {
+class RenderViewHost;
+class WebUI;
+}
+
+// Implement this class to receive notifications.
+class WebDialogObserver {
+ public:
+  // Invoked when a web dialog has been shown.
+  // |webui| is the WebUI with which the dialog is associated.
+  // |render_view_host| is the RenderViewHost for the shown dialog.
+  virtual void OnDialogShown(content::WebUI* webui,
+                             content::RenderViewHost* render_view_host) = 0;
+
+ protected:
+  virtual ~WebDialogObserver() {}
+};
+
+#endif  // CHROME_BROWSER_UI_WEBUI_WEB_DIALOG_OBSERVER_H_