chrome: Cleanup class/struct forward declarations

chrome/browser/ui/views/profiles/signin_view_controller_delegate_views.h

 // Copyright 2016 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_VIEWS_PROFILES_SIGNIN_VIEW_CONTROLLER_DELEGATE_VIEWS_H_
 #define CHROME_BROWSER_UI_VIEWS_PROFILES_SIGNIN_VIEW_CONTROLLER_DELEGATE_VIEWS_H_
 
 #include "base/macros.h"
 #include "chrome/browser/ui/profile_chooser_constants.h"
 #include "chrome/browser/ui/signin_view_controller_delegate.h"
 #include "ui/views/window/dialog_delegate.h"
 
 class Browser;
-class Profile;
 
 namespace content {
 class WebContentsDelegate;
 }
 
 namespace signin_metrics {
 enum class AccessPoint;
 }
 
 namespace views {
@@ skipping 54 matching lines @@
   // wait_for_size_ stores whether the dialog should only be shown after its
   // content's size has been laid out and measured so that the constrained
   // window is sized to the content.
   bool wait_for_size_;
   Browser* browser_;
 
   DISALLOW_COPY_AND_ASSIGN(SigninViewControllerDelegateViews);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PROFILES_SIGNIN_VIEW_CONTROLLER_DELEGATE_VIEWS_H_