Revert of Supervised user web restrictions content provider

chrome/browser/supervised_user/supervised_user_interstitial.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_INTERSTITIAL_H_
 #define CHROME_BROWSER_SUPERVISED_USER_SUPERVISED_USER_INTERSTITIAL_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 17 matching lines @@
                                    public SupervisedUserServiceObserver {
  public:
   // Interstitial type, used for testing.
   static content::InterstitialPageDelegate::TypeID kTypeForTesting;
 
   static void Show(content::WebContents* web_contents,
                    const GURL& url,
                    SupervisedUserURLFilter::FilteringBehaviorReason reason,
                    const base::Callback<void(bool)>& callback);
 
-  static std::string GetHTMLContents(
-      Profile* profile,
-      SupervisedUserURLFilter::FilteringBehaviorReason reason);
-
  private:
   SupervisedUserInterstitial(
       content::WebContents* web_contents,
       const GURL& url,
       SupervisedUserURLFilter::FilteringBehaviorReason reason,
       const base::Callback<void(bool)>& callback);
   ~SupervisedUserInterstitial() override;
 
   bool Init();
 
@@ skipping 30 matching lines @@
   SupervisedUserURLFilter::FilteringBehaviorReason reason_;
 
   base::Callback<void(bool)> callback_;
 
   base::WeakPtrFactory<SupervisedUserInterstitial> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SupervisedUserInterstitial);
 };
 
 #endif  // CHROME_BROWSER_SUPERVISED_USER_SUPERVISED_USER_INTERSTITIAL_H_