chrome: Cleanup class/struct forward declarations

chrome/browser/ui/login/login_handler.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_UI_LOGIN_LOGIN_HANDLER_H_
 #define CHROME_BROWSER_UI_LOGIN_LOGIN_HANDLER_H_
 
 #include <memory>
 #include <string>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/synchronization/lock.h"
 #include "components/password_manager/core/browser/password_manager.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/resource_dispatcher_host_login_delegate.h"
 #include "content/public/browser/resource_request_info.h"
 
 class AppModalDialogHelper;
 class GURL;
 class LoginInterstitialDelegate;
 
 namespace content {
-class RenderViewHostDelegate;
 class NotificationRegistrar;
 class WebContents;
 }  // namespace content
 
 namespace net {
 class AuthChallengeInfo;
 class HttpNetworkSession;
 class URLRequest;
 }  // namespace net
 
@@ skipping 262 matching lines @@
 // on the main UI thread via a call to UI loop's InvokeLater, and will send the
 // credentials back to the net::URLRequest on the calling thread.
 // A LoginHandler object (which lives on the calling thread) is returned,
 // which can be used to set or cancel authentication programmatically.  The
 // caller must invoke OnRequestCancelled() on this LoginHandler before
 // destroying the net::URLRequest.
 LoginHandler* CreateLoginPrompt(net::AuthChallengeInfo* auth_info,
                                 net::URLRequest* request);
 
 #endif  // CHROME_BROWSER_UI_LOGIN_LOGIN_HANDLER_H_