chrome: Cleanup class/struct forward declarations

chrome/browser/ui/login/login_interstitial_delegate.h

 // Copyright 2014 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_INTERSTITIAL_DELEGATE_H_
 #define CHROME_BROWSER_UI_LOGIN_LOGIN_INTERSTITIAL_DELEGATE_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "content/public/browser/interstitial_page.h"
 #include "content/public/browser/interstitial_page_delegate.h"
 #include "url/gurl.h"
 
-class LoginHandler;
-
 namespace content {
 class WebContents;
 }
 
-namespace net {
-class AuthChallengeInfo;
-}
-
 // Placeholder interstitial for HTTP login prompts. This interstitial makes the
 // omnibox show the correct url when the login prompt is visible.
 class LoginInterstitialDelegate : public content::InterstitialPageDelegate {
  public:
   // Interstitial type, used in tests.
   static content::InterstitialPageDelegate::TypeID kTypeForTesting;
 
   LoginInterstitialDelegate(content::WebContents* web_contents,
                             const GURL& request_url,
                             base::Closure& callback);
@@ skipping 13 matching lines @@
 
  private:
   base::Closure callback_;
   content::InterstitialPage* interstitial_page_;
   base::WeakPtrFactory<LoginInterstitialDelegate> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(LoginInterstitialDelegate);
 };
 
 #endif  // CHROME_BROWSER_UI_LOGIN_LOGIN_INTERSTITIAL_DELEGATE_H_