Experiment with HSTS preload list filtering.

net/http/BUILD.gn

Index: net/http/BUILD.gn
diff --git a/net/http/BUILD.gn b/net/http/BUILD.gn
index e51061939fa3addbc41df6b73949e87c2e3e6d7e..86a29ef8a604954a29ca2f437f0eadede8df29a2 100644
--- a/net/http/BUILD.gn
+++ b/net/http/BUILD.gn
@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 import("//build/compiled_action.gni")
+import("//net/features.gni")
 
 compiled_action("generate_transport_security_state") {
   tool = "//net/tools/transport_security_state_generator"
@@ -16,8 +17,9 @@ compiled_action("generate_transport_security_state") {
   outputs = [
     "$target_gen_dir/transport_security_state_static.h",
   ]
-  args =
-      rebase_path(inputs, root_build_dir) + rebase_path(outputs, root_build_dir)
+  args = rebase_path(inputs, root_build_dir) +
+         rebase_path(outputs, root_build_dir) +
+         [ "--filter-level=$hsts_preload_list_filter_level" ]
 }
 
 compiled_action_foreach("transport_security_state_unittest_data") {