Move the supervised user error page to a component

chrome/browser/supervised_user/supervised_user_resource_throttle.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_SUPERVISED_USER_SUPERVISED_USER_RESOURCE_THROTTLE_H_
 #define CHROME_BROWSER_SUPERVISED_USER_SUPERVISED_USER_RESOURCE_THROTTLE_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/supervised_user/supervised_user_url_filter.h"
 #include "chrome/browser/supervised_user/supervised_users.h"
+#include "components/supervised_user_error_page/supervised_user_error_page.h"
 #include "content/public/browser/resource_throttle.h"
 
 namespace net {
 class URLRequest;
 }
 
 class SupervisedUserResourceThrottle : public content::ResourceThrottle {
  public:
   SupervisedUserResourceThrottle(const net::URLRequest* request,
                                  bool is_main_frame,
                                  const SupervisedUserURLFilter* url_filter);
   ~SupervisedUserResourceThrottle() override;
 
   // content::ResourceThrottle implementation:
   void WillStartRequest(bool* defer) override;
 
   void WillRedirectRequest(const net::RedirectInfo& redirect_info,
                            bool* defer) override;
 
   const char* GetNameForLogging() const override;
 
  private:
   void ShowInterstitialIfNeeded(bool is_redirect, const GURL& url, bool* defer);
   void ShowInterstitial(
       const GURL& url,
-      SupervisedUserURLFilter::FilteringBehaviorReason reason);
+      supervised_user_error_page::FilteringBehaviorReason reason);
   void OnCheckDone(const GURL& url,
                    SupervisedUserURLFilter::FilteringBehavior behavior,
-                   SupervisedUserURLFilter::FilteringBehaviorReason reason,
+                   supervised_user_error_page::FilteringBehaviorReason reason,
                    bool uncertain);
   void OnInterstitialResult(bool continue_request);
 
   const net::URLRequest* request_;
   bool is_main_frame_;
   const SupervisedUserURLFilter* url_filter_;
   bool deferred_;
   SupervisedUserURLFilter::FilteringBehavior behavior_;
   base::WeakPtrFactory<SupervisedUserResourceThrottle> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SupervisedUserResourceThrottle);
 };
 
 #endif  // CHROME_BROWSER_SUPERVISED_USER_SUPERVISED_USER_RESOURCE_THROTTLE_H_