Add the client for accessing Subresource Filter only list.

chrome/browser/subresource_filter/subresource_filter_navigation_trottle_util.cc

Index: chrome/browser/subresource_filter/subresource_filter_navigation_trottle_util.cc
diff --git a/chrome/browser/subresource_filter/subresource_filter_navigation_trottle_util.cc b/chrome/browser/subresource_filter/subresource_filter_navigation_trottle_util.cc
new file mode 100644
index 0000000000000000000000000000000000000000..65372188d2e11e27114de1a039abf68860632434
--- /dev/null
+++ b/chrome/browser/subresource_filter/subresource_filter_navigation_trottle_util.cc
@@ -0,0 +1,26 @@
+// 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/subresource_filter_navigation_trottle_util.h"
+
+#include "base/memory/ptr_util.h"
+#include "chrome/browser/safe_browsing/safe_browsing_service.h"
+#include "components/safe_browsing_db/v4_feature_list.h"
+#include "components/subresource_filter/content/browser/subresource_filter_activation_navigation_throttle.h"
+#include "content/public/browser/navigation_handle.h"
+
+std::unique_ptr<content::NavigationThrottle>
+MaybeCreateSubresourceFilterNavigationThrottle(
+    content::NavigationHandle* handle,
+    safe_browsing::SafeBrowsingService* sb_service) {
+  if (handle->IsInMainFrame() &&
+      sb_service->database_manager()->IsSupported() &&
+      (safe_browsing::V4FeatureList::IsV4HybridEnabled() ||

[vakh (use Gerrit instead), 2017/02/10 03:00:12]

these methods are going away soon so don't be surprised if your build breaks
after a rebase.
See: https://codereview.chromium.org/2675063002/#ps160001

[melandory, 2017/02/14 17:40:34]

Rebased on top of it.

+       safe_browsing::V4FeatureList::IsV4OnlyEnabled())) {
+    return base::WrapUnique(
+        new subresource_filter::SubresourceFilterActivationNavigationThrottle(
+            handle, sb_service->v4_local_database_manager()));
+  }
+  return nullptr;
+}