Get rid of user-level styles.

chrome/browser/user_style_sheet_watcher.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_USER_STYLE_SHEET_WATCHER_H_
-#define CHROME_BROWSER_USER_STYLE_SHEET_WATCHER_H_
-
-#include "base/callback_list.h"
-#include "base/files/file_path.h"
-#include "base/files/file_path_watcher.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/sequenced_task_runner_helpers.h"
-#include "components/browser_context_keyed_service/refcounted_browser_context_keyed_service.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
-#include "url/gurl.h"
-
-class Profile;
-class UserStyleSheetLoader;
-
-// Watches the user style sheet file and triggers reloads on the file thread
-// whenever the file changes.
-class UserStyleSheetWatcher
-    : public content::NotificationObserver,
-      public RefcountedBrowserContextKeyedService {
- public:
-  UserStyleSheetWatcher(Profile* profile, const base::FilePath& profile_path);
-
-  void Init();
-
-  GURL user_style_sheet() const;
-
-  // Register a callback to be called whenever the stylesheet gets updated.
-  scoped_ptr<base::CallbackList<void(void)>::Subscription>
-  RegisterOnStyleSheetUpdatedCallback(const base::Closure& callback);
-
-  // content::NotificationObserver interface
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) OVERRIDE;
-
-  // RefCountedProfileKeyedBase method override.
-  virtual void ShutdownOnUIThread() OVERRIDE;
-
- private:
-  friend class base::DeleteHelper<UserStyleSheetWatcher>;
-
-  virtual ~UserStyleSheetWatcher();
-
-  // The profile owning us.
-  Profile* profile_;
-
-  // The directory containing User StyleSheets/Custom.css.
-  base::FilePath profile_path_;
-
-  // The loader object.
-  scoped_refptr<UserStyleSheetLoader> loader_;
-
-  // Watches for changes to the css file so we can reload the style sheet.
-  scoped_ptr<base::FilePathWatcher> file_watcher_;
-
-  content::NotificationRegistrar registrar_;
-
-  DISALLOW_COPY_AND_ASSIGN(UserStyleSheetWatcher);
-};
-
-#endif  // CHROME_BROWSER_USER_STYLE_SHEET_WATCHER_H_