Move DocumentSubresourceFilter to core/common.

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.
 
 static_library("common") {
   sources = [
     "activation_level.cc",
     "activation_level.h",
     "activation_list.cc",
     "activation_list.h",
     "activation_scope.cc",
     "activation_scope.h",
     "activation_state.h",
     "closed_hash_map.h",
     "copying_file_stream.cc",
     "copying_file_stream.h",
+    "document_load_statistics.h",
+    "document_subresource_filter.cc",
+    "document_subresource_filter.h",
     "first_party_origin.cc",
     "first_party_origin.h",
     "fuzzy_pattern_matching.cc",
     "fuzzy_pattern_matching.h",
     "indexed_ruleset.cc",
     "indexed_ruleset.h",
     "knuth_morris_pratt.h",
     "memory_mapped_ruleset.cc",
     "memory_mapped_ruleset.h",
     "ngram_extractor.h",
@@ skipping 35 matching lines @@
     "//base",
     "//testing/gtest",
     "//third_party/protobuf:protobuf_lite",
   ]
 }
 
 source_set("unit_tests") {
   testonly = true
   sources = [
     "closed_hash_map_unittest.cc",
+    "document_subresource_filter_unittest.cc",
     "first_party_origin_unittest.cc",
     "fuzzy_pattern_matching_unittest.cc",
     "indexed_ruleset_unittest.cc",
     "knuth_morris_pratt_unittest.cc",
     "ngram_extractor_unittest.cc",
     "scoped_timers_unittest.cc",
     "string_splitter_unittest.cc",
     "unindexed_ruleset_unittest.cc",
     "url_pattern_matching_unittest.cc",
   ]
   deps = [
     ":common",
+    ":test_support",
     "//base",
     "//base/test:test_support",
     "//testing/gtest",
     "//third_party/protobuf:protobuf_lite",
     "//url",
   ]
 }