[sync] Add typed url sync metadata to the history db

components/history/core/browser/BUILD.gn

Index: components/history/core/browser/BUILD.gn
diff --git a/components/history/core/browser/BUILD.gn b/components/history/core/browser/BUILD.gn
index 3e89493c14be77849115e1541644ac621b89bff9..e4c4d21987b2f622f3c751e913ce58fa0f204bb0 100644
--- a/components/history/core/browser/BUILD.gn
+++ b/components/history/core/browser/BUILD.gn
@@ -66,6 +66,8 @@ static_library("browser") {
     "top_sites_observer.h",
     "typed_url_data_type_controller.cc",
     "typed_url_data_type_controller.h",
+    "typed_url_sync_metadata_database.cc",
+    "typed_url_sync_metadata_database.h",
     "typed_url_syncable_service.cc",
     "typed_url_syncable_service.h",
     "url_database.cc",
@@ -88,6 +90,7 @@ static_library("browser") {
   ]
 
   public_deps = [
+    "//components/sync/protocol",
     "//skia",
   ]
 
@@ -194,6 +197,7 @@ source_set("unit_tests") {
     "top_sites_cache_unittest.cc",
     "top_sites_database_unittest.cc",
     "top_sites_impl_unittest.cc",
+    "typed_url_sync_metadata_database_unittest.cc",
     "typed_url_syncable_service_unittest.cc",
     "url_database_unittest.cc",
     "url_utils_unittest.cc",