Add foundation for trimming the AffiliationDatabase.

components/password_manager/core/browser/affiliation_database.h

Index: components/password_manager/core/browser/affiliation_database.h
diff --git a/components/password_manager/core/browser/affiliation_database.h b/components/password_manager/core/browser/affiliation_database.h
index 11d2c0ecede122027ed90ecb10c7c64907ee7451..621add9cd0c416d0779135912bf24539c1b31401 100644
--- a/components/password_manager/core/browser/affiliation_database.h
+++ b/components/password_manager/core/browser/affiliation_database.h
@@ -70,6 +70,10 @@ class AffiliationDatabase {
       const AffiliatedFacetsWithUpdateTime& affiliated_facets,
       std::vector<AffiliatedFacetsWithUpdateTime>* removed_affiliations);
 
+  // Deletes the database file at |path| along with all its auxiliary files. The
+  // database must be closed before calling this.
+  static void Delete(const base::FilePath& path);
+
  private:
   // Creates any tables and indices that do not already exist in the database.
   bool CreateTablesAndIndicesIfNeeded();