Revert of Supervised Users: Create ResourceThrottle only if filtering is enabled

chrome/browser/supervised_user/supervised_user_service.cc

Index: chrome/browser/supervised_user/supervised_user_service.cc
diff --git a/chrome/browser/supervised_user/supervised_user_service.cc b/chrome/browser/supervised_user/supervised_user_service.cc
index a470f3e61eac67f13219e63cce019f03dede20cf..324f525d62632145ea2ce299f1691c02c2797820 100644
--- a/chrome/browser/supervised_user/supervised_user_service.cc
+++ b/chrome/browser/supervised_user/supervised_user_service.cc
@@ -441,13 +441,6 @@
   return io_url_filter_.get();
 }
 
-void SupervisedUserService::URLFilterContext::SetEnabled(bool enabled) {
-  ui_url_filter_->SetEnabled(enabled);
-  BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
-                          base::Bind(&SupervisedUserURLFilter::SetEnabled,
-                                     io_url_filter_, enabled));
-}
-
 void SupervisedUserService::URLFilterContext::SetDefaultFilteringBehavior(
     SupervisedUserURLFilter::FilteringBehavior behavior) {
   ui_url_filter_->SetDefaultFilteringBehavior(behavior);
@@ -679,8 +672,6 @@
     BrowserList::RemoveObserver(this);
 #endif
   }
-
-  url_filter_context_.SetEnabled(active_);
 }
 
 #if !defined(OS_ANDROID)