Supervised Users: Create ResourceThrottle only if filtering is enabled

chrome/browser/supervised_user/supervised_user_resource_throttle.cc

 // 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.
 
 #include "chrome/browser/supervised_user/supervised_user_resource_throttle.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/histogram_macros.h"
 #include "chrome/browser/supervised_user/supervised_user_interstitial.h"
@@ skipping 99 matching lines @@
 }  // namespace
 
 // static
 std::unique_ptr<SupervisedUserResourceThrottle>
 SupervisedUserResourceThrottle::MaybeCreate(
     const net::URLRequest* request,
     content::ResourceType resource_type,
     const SupervisedUserURLFilter* url_filter) {
   // Only treat main frame requests (ignoring subframes and subresources).
   bool is_main_frame = resource_type == content::RESOURCE_TYPE_MAIN_FRAME;
-  if (!is_main_frame)
+  if (!is_main_frame || !url_filter->enabled())
     return nullptr;
 
   // Can't use base::MakeUnique because the constructor is private.
   return base::WrapUnique(
       new SupervisedUserResourceThrottle(request, url_filter));
 }
 
 SupervisedUserResourceThrottle::SupervisedUserResourceThrottle(
     const net::URLRequest* request,
     const SupervisedUserURLFilter* url_filter)
@@ skipping 77 matching lines @@
     Resume();
 }
 
 void SupervisedUserResourceThrottle::OnInterstitialResult(
     bool continue_request) {
   if (continue_request)
     Resume();
   else
     Cancel();
 }