Introduce password_manager::FormSaver

components/password_manager/core/browser/BUILD.gn

Index: components/password_manager/core/browser/BUILD.gn
diff --git a/components/password_manager/core/browser/BUILD.gn b/components/password_manager/core/browser/BUILD.gn
index 1001d5eee2a36f6716b53e6ce44a4fc75d523f51..145ad672543833d54126e7775f00173f549f88cc 100644
--- a/components/password_manager/core/browser/BUILD.gn
+++ b/components/password_manager/core/browser/BUILD.gn
@@ -44,6 +44,9 @@ source_set("browser") {
     "facet_manager.cc",
     "facet_manager.h",
     "facet_manager_host.h",
+    "form_saver.h",
+    "form_saver_impl.cc",
+    "form_saver_impl.h",
     "import/csv_reader.cc",
     "import/csv_reader.h",
     "import/password_csv_reader.cc",
@@ -175,6 +178,7 @@ source_set("test_support") {
     "mock_password_store.h",
     "password_manager_test_utils.cc",
     "password_manager_test_utils.h",
+    "stub_form_saver.h",
     "stub_log_manager.cc",
     "stub_log_manager.h",
     "stub_password_manager_client.cc",
@@ -244,6 +248,7 @@ source_set("unit_tests") {
     "export/password_csv_writer_unittest.cc",
     "export/password_exporter_unittest.cc",
     "facet_manager_unittest.cc",
+    "form_saver_impl_unittest.cc",
     "import/csv_reader_unittest.cc",
     "import/password_csv_reader_unittest.cc",
     "import/password_importer_unittest.cc",