Convert some component source sets to static library

components/subresource_filter/core/common/BUILD.gn

 # Copyright 2016 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.
 
-source_set("common") {
+static_library("common") {
   sources = [
     "activation_state.cc",
     "activation_state.h",
     "closed_hash_map.h",
     "fuzzy_pattern_matching.cc",
     "fuzzy_pattern_matching.h",
     "indexed_ruleset.cc",
     "indexed_ruleset.h",
     "knuth_morris_pratt.h",
     "memory_mapped_ruleset.cc",
@@ skipping 12 matching lines @@
   ]
 
   deps = [
     "//base",
     "//net",
     "//third_party/flatbuffers:flatbuffers",
     "//url",
   ]
 }
 
-source_set("test_support") {
+static_library("test_support") {
   testonly = true
   sources = [
     "test_ruleset_creator.cc",
     "test_ruleset_creator.h",
   ]
   deps = [
     "//base",
     "//testing/gtest",
   ]
 }
 
 source_set("unit_tests") {
   testonly = true
   sources = [
     "closed_hash_map_unittest.cc",
     "fuzzy_pattern_matching_unittest.cc",
     "indexed_ruleset_unittest.cc",
     "knuth_morris_pratt_unittest.cc",
     "ngram_extractor_unittest.cc",
     "string_splitter_unittest.cc",
     "url_pattern_matching_unittest.cc",
   ]
   deps = [
     ":common",
     "//base",
     "//testing/gtest",
     "//url",
   ]
 }