Remove NOTIFICATION_USER_STYLE_SHEET_UPDATED

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_forward.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;
 
+  void RegisterOnLoadedCallback(const base::Closure& callback);

[battre, 2013/08/19 08:32:19]

Can you add a comment on what "Loaded" meant? When I read the CL for the first
time, I initially thought

UserStyleSheetWatcher* uss = ...
uss->RegisterOnLoadedCallback(...)

meant "Notify you, when the stylesheet watcher has been started. Alternatively,
you may find a different function name that reflects this.

[Cait (Slow), 2013/08/19 14:56:39]

Done.

+
   // 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>;
@@ skipping 11 matching lines @@
 
   // 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_