Add the client for accessing Subresource Filter only list.

components/subresource_filter/content/browser/BUILD.gn

Index: components/subresource_filter/content/browser/BUILD.gn
diff --git a/components/subresource_filter/content/browser/BUILD.gn b/components/subresource_filter/content/browser/BUILD.gn
index 44eeb1db6c4cfa53f3cc05b8a0bc4f73b423e5fa..e2fd94888ffd202c86d0341f1888b3be277b1c77 100644
--- a/components/subresource_filter/content/browser/BUILD.gn
+++ b/components/subresource_filter/content/browser/BUILD.gn
@@ -14,12 +14,16 @@ static_library("browser") {
     "content_subresource_filter_driver_factory.h",
     "subframe_navigation_filtering_throttle.cc",
     "subframe_navigation_filtering_throttle.h",
+    "subresource_filter_safe_browsing_activation_throttle.cc",
+    "subresource_filter_safe_browsing_activation_throttle.h",
     "verified_ruleset_dealer.cc",
     "verified_ruleset_dealer.h",
   ]
   deps = [
     "//base",
+    "//components/safe_browsing_db:database_manager",
     "//components/safe_browsing_db:util",
+    "//components/safe_browsing_db:v4_local_database_manager",
     "//components/subresource_filter/content/common",
     "//components/subresource_filter/core/browser",
     "//components/subresource_filter/core/common",