Generalize migration code in WebDatabase.

chrome/browser/webdata/logins_table.cc

Index: chrome/browser/webdata/logins_table.cc
diff --git a/chrome/browser/webdata/logins_table.cc b/chrome/browser/webdata/logins_table.cc
index fe7025ec98648f03bf738a48a074a28c8839dd54..35a1be2a2b2fed2869539ed72fb03a4dffb89a08 100644
--- a/chrome/browser/webdata/logins_table.cc
+++ b/chrome/browser/webdata/logins_table.cc
@@ -41,3 +41,9 @@ bool LoginsTable::Init() {
 bool LoginsTable::IsSyncable() {
   return true;
 }
+
+bool LoginsTable::MigrateToVersion(int version,
+                                   const std::string& app_locale,
+                                   bool* update_compatible_version) {
+  return true;
+}