[subresource_filter] Move throttle insertion into the client

chrome/browser/subresource_filter/navigation_throttle_util.cc

Index: chrome/browser/subresource_filter/navigation_throttle_util.cc
diff --git a/chrome/browser/subresource_filter/navigation_throttle_util.cc b/chrome/browser/subresource_filter/navigation_throttle_util.cc
deleted file mode 100644
index d5a6fc1cbdd83b4406bbe334a8d54fe943e33502..0000000000000000000000000000000000000000
--- a/chrome/browser/subresource_filter/navigation_throttle_util.cc
+++ /dev/null
@@ -1,26 +0,0 @@
-// Copyright (c) 2017 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/subresource_filter/navigation_throttle_util.h"
-
-#include "chrome/browser/safe_browsing/safe_browsing_service.h"
-#include "components/safe_browsing_db/database_manager.h"
-#include "components/safe_browsing_db/v4_feature_list.h"
-#include "components/subresource_filter/content/browser/subresource_filter_safe_browsing_activation_throttle.h"
-#include "components/subresource_filter/core/browser/subresource_filter_features.h"
-#include "content/public/browser/navigation_handle.h"
-
-content::NavigationThrottle* MaybeCreateSubresourceFilterNavigationThrottle(
-    content::NavigationHandle* navigation_handle,
-    safe_browsing::SafeBrowsingService* safe_browsing_service) {
-  if (navigation_handle->IsInMainFrame() && safe_browsing_service &&
-      safe_browsing_service->database_manager()->IsSupported() &&
-      safe_browsing::V4FeatureList::GetV4UsageStatus() ==
-          safe_browsing::V4FeatureList::V4UsageStatus::V4_ONLY) {
-    return new subresource_filter::
-        SubresourceFilterSafeBrowsingActivationThrottle(
-            navigation_handle, safe_browsing_service->database_manager());
-  }
-  return nullptr;
-}