chrome: Cleanup class/struct forward declarations

chrome/browser/profiles/profile_list_desktop.h

 // Copyright 2013 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_PROFILES_PROFILE_LIST_DESKTOP_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_LIST_DESKTOP_H_
 
 #include <stddef.h>
 
 #include <memory>
 #include <vector>
 
 #include "base/macros.h"
 #include "chrome/browser/profiles/profile_list.h"
 
-class Browser;
 class ProfileAttributesStorage;
 
 // This model represents the profiles added to desktop Chrome (as opposed to
 // Chrome OS). Profiles marked not to appear in the list will be omitted
 // throughout.
 class ProfileListDesktop : public ProfileList {
  public:
   explicit ProfileListDesktop(ProfileAttributesStorage* profile_storage);
   ~ProfileListDesktop() override;
 
@@ skipping 15 matching lines @@
   // The path of the currently active profile.
   base::FilePath active_profile_path_;
 
   // List of built "menu items."
   std::vector<std::unique_ptr<AvatarMenu::Item>> items_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileListDesktop);
 };
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_LIST_DESKTOP_H_