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

chrome/browser/webdata/web_database_migration_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <string>
 
 #include "base/file_util.h"
 #include "base/message_loop.h"
 #include "base/scoped_temp_dir.h"
 #include "base/stl_util.h"
@@ skipping 208 matching lines @@
   {
     sql::Connection connection;
     ASSERT_TRUE(connection.Open(GetDatabasePath()));
 
     // Check version.
     EXPECT_EQ(kCurrentTestedVersionNumber, VersionFromConnection(&connection));
 
     // Check that expected tables are present.
     EXPECT_TRUE(connection.DoesTableExist("meta"));
     EXPECT_TRUE(connection.DoesTableExist("keywords"));
-    EXPECT_TRUE(connection.DoesTableExist("logins"));
+    EXPECT_FALSE(connection.DoesTableExist("logins"));  // This one is obsolete.
     EXPECT_TRUE(connection.DoesTableExist("web_app_icons"));
     EXPECT_TRUE(connection.DoesTableExist("web_apps"));
     EXPECT_TRUE(connection.DoesTableExist("autofill"));
     EXPECT_TRUE(connection.DoesTableExist("autofill_dates"));
     EXPECT_TRUE(connection.DoesTableExist("autofill_profiles"));
     EXPECT_TRUE(connection.DoesTableExist("credit_cards"));
     EXPECT_TRUE(connection.DoesTableExist("token_service"));
   }
 }
 
@@ skipping 1688 matching lines @@
                                     &default_search_provider_id_backup));
     // Backup ID must be updated to match the old default search provider ID.
     EXPECT_EQ(default_search_provider_id, default_search_provider_id_backup);
 
     std::string default_search_provider_id_backup_signature;
     EXPECT_TRUE(meta_table.GetValue(KeywordTable::kBackupSignatureKey,
         &default_search_provider_id_backup_signature));
     EXPECT_FALSE(default_search_provider_id_backup_signature.empty());
   }
 }