Move DocumentSubresourceFilter to core/common.

components/subresource_filter/core/common/BUILD.gn

Index: components/subresource_filter/core/common/BUILD.gn
diff --git a/components/subresource_filter/core/common/BUILD.gn b/components/subresource_filter/core/common/BUILD.gn
index ea11db72aa1725dc7740e4e126dbf409e7156e4b..ef133bfe2e9010c6110400cd92a1c5198c5cdd4c 100644
--- a/components/subresource_filter/core/common/BUILD.gn
+++ b/components/subresource_filter/core/common/BUILD.gn
@@ -14,6 +14,9 @@ static_library("common") {
     "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",
@@ -69,6 +72,7 @@ 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",
@@ -81,6 +85,7 @@ source_set("unit_tests") {
   ]
   deps = [
     ":common",
+    ":test_support",
     "//base",
     "//base/test:test_support",
     "//testing/gtest",