Convert SupervisedUserResourceThrottle to a NavigationThrottle.

chrome/browser/supervised_user/supervised_user_service_unittest.cc

Index: chrome/browser/supervised_user/supervised_user_service_unittest.cc
diff --git a/chrome/browser/supervised_user/supervised_user_service_unittest.cc b/chrome/browser/supervised_user/supervised_user_service_unittest.cc
index af98de1259dbe9242504bc6d4e5b3a1c6681e180..3f9c49b1930d4b3799e1d34913fdf31b8410c7c0 100644
--- a/chrome/browser/supervised_user/supervised_user_service_unittest.cc
+++ b/chrome/browser/supervised_user/supervised_user_service_unittest.cc
@@ -386,7 +386,7 @@ class SupervisedUserServiceExtensionTestBase
     service->Init();
     site_list_observer_.Init(service->GetWhitelistService());
 
-    SupervisedUserURLFilter* url_filter = service->GetURLFilterForUIThread();
+    SupervisedUserURLFilter* url_filter = service->GetURLFilter();
     url_filter->SetBlockingTaskRunnerForTesting(
         base::ThreadTaskRunnerHandle::Get());
     url_filter_observer_.Init(url_filter);
@@ -587,8 +587,7 @@ TEST_F(SupervisedUserServiceExtensionTest,
 TEST_F(SupervisedUserServiceExtensionTest, NoContentPacks) {
   SupervisedUserService* supervised_user_service =
       SupervisedUserServiceFactory::GetForProfile(profile_.get());
-  SupervisedUserURLFilter* url_filter =
-      supervised_user_service->GetURLFilterForUIThread();
+  SupervisedUserURLFilter* url_filter = supervised_user_service->GetURLFilter();
 
   // ASSERT_EQ instead of ASSERT_TRUE([...].empty()) so that the error
   // message contains the size in case of failure.
@@ -602,8 +601,7 @@ TEST_F(SupervisedUserServiceExtensionTest, NoContentPacks) {
 TEST_F(SupervisedUserServiceExtensionTest, InstallContentPacks) {
   SupervisedUserService* supervised_user_service =
       SupervisedUserServiceFactory::GetForProfile(profile_.get());
-  SupervisedUserURLFilter* url_filter =
-      supervised_user_service->GetURLFilterForUIThread();
+  SupervisedUserURLFilter* url_filter = supervised_user_service->GetURLFilter();
 
   const std::string id1 = "ID 1";
   const base::string16 title1 = base::ASCIIToUTF16("Title 1");