Remove the very old code that migrated password data from the WebDataService to PasswordStore.

chrome/browser/webdata/web_database.cc

Index: chrome/browser/webdata/web_database.cc
===================================================================
--- chrome/browser/webdata/web_database.cc	(revision 133948)
+++ chrome/browser/webdata/web_database.cc	(working copy)
@@ -131,6 +131,9 @@
   // Create the tables.
   autofill_table_.reset(new AutofillTable(&db_, &meta_table_));
   keyword_table_.reset(new KeywordTable(&db_, &meta_table_));
+  // TODO(mdm): We only really need the LoginsTable on Windows for IE7 password
+  // access, but for now, we still create it on all platforms since it deletes
+  // the old logins table. We can remove this after a while, e.g. in M22 or so.
   logins_table_.reset(new LoginsTable(&db_, &meta_table_));
   token_service_table_.reset(new TokenServiceTable(&db_, &meta_table_));
   web_apps_table_.reset(new WebAppsTable(&db_, &meta_table_));