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

components/history/core/browser/history_database.h

Index: components/history/core/browser/history_database.h
diff --git a/components/history/core/browser/history_database.h b/components/history/core/browser/history_database.h
index 9a26ae981941c1d598e8db459b5c84fb1f5103f1..dc9989d60aeb92924006386ed081ede29d1704d6 100644
--- a/components/history/core/browser/history_database.h
+++ b/components/history/core/browser/history_database.h
@@ -13,6 +13,7 @@
 #include "build/build_config.h"
 #include "components/history/core/browser/download_database.h"
 #include "components/history/core/browser/history_types.h"
+#include "components/history/core/browser/typed_url_sync_metadata_database.h"
 #include "components/history/core/browser/url_database.h"
 #include "components/history/core/browser/visit_database.h"
 #include "components/history/core/browser/visitsegment_database.h"
@@ -45,6 +46,7 @@ class HistoryDatabase : public DownloadDatabase,
                         public AndroidURLsDatabase,
                         public AndroidCacheDatabase,
 #endif
+                        public TypedURLSyncMetadataDatabase,
                         public URLDatabase,
                         public VisitDatabase,
                         public VisitSegmentDatabase {
@@ -169,9 +171,13 @@ class HistoryDatabase : public DownloadDatabase,
 #endif
   friend class ::InMemoryURLIndexTest;
 
-  // Overridden from URLDatabase:
+  // Overridden from URLDatabase, DownloadDatabase, VisitDatabase,
+  // VisitSegmentDatabase and TypedURLSyncMetadataDatabase.
   sql::Connection& GetDB() override;
 
+  // Overridden from TypedURLSyncMetadataDatabase.
+  sql::MetaTable& GetMetaTable() override;
+
   // Migration -----------------------------------------------------------------
 
   // Makes sure the version is up to date, updating if necessary. If the