Remove chrome/ code to handle App Notifications

chrome/browser/extensions/app_notify_channel_ui.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_APP_NOTIFY_CHANNEL_UI_H_
-#define CHROME_BROWSER_EXTENSIONS_APP_NOTIFY_CHANNEL_UI_H_
-
-#include <string>
-
-class Profile;
-
-namespace content {
-class WebContents;
-}
-
-namespace extensions {
-
-// An interface for prompting a user to sign in to sync so that we can create
-// an app notification channel for one of their apps.
-class AppNotifyChannelUI {
- public:
-  virtual ~AppNotifyChannelUI() {}
-
-  // Used to customize the UI we show.
-  enum UIType {
-    // Do not prompt the user with an infobar.
-    NO_INFOBAR,
-
-    // Ask if the app can show notifications.
-    NOTIFICATION_INFOBAR,
-  };
-
-  class Delegate {
-   public:
-    // A callback for whether the user successfully set up sync or not.
-    virtual void OnSyncSetupResult(bool enabled) = 0;
-
-   protected:
-    virtual ~Delegate() {}
-  };
-
-  // Shows a prompt for sync setup - |delegate| will be called back later when
-  // setup is complete or cancelled. This should only be called once per
-  // instance.
-  virtual void PromptSyncSetup(Delegate* delegate) = 0;
-
-  // Builds the platform specific AppNotifyChannelUI.
-  static AppNotifyChannelUI* Create(Profile* profile,
-                                    content::WebContents* web_contents,
-                                    const std::string& app_name,
-                                    AppNotifyChannelUI::UIType ui_type);
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_APP_NOTIFY_CHANNEL_UI_H_