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

chrome/common/pref_names.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 "chrome/common/pref_names.h"
 
 #include "base/basictypes.h"
 
 namespace prefs {
 
@@ skipping 1536 matching lines @@
 // Create web application shortcut dialog preferences.
 const char kWebAppCreateOnDesktop[] = "browser.web_app.create_on_desktop";
 const char kWebAppCreateInAppsMenu[] = "browser.web_app.create_in_apps_menu";
 const char kWebAppCreateInQuickLaunchBar[] =
     "browser.web_app.create_in_quick_launch_bar";
 
 // Dictionary that maps Geolocation network provider server URLs to
 // corresponding access token.
 const char kGeolocationAccessToken[] = "geolocation.access_token";
 
-// Whether PasswordForms have been migrated from the WedDataService to the
-// LoginDatabase.
-const char kLoginDatabaseMigrated[] = "login_database.migrated";
-
 // Boolean that indicates whether to allow firewall traversal while trying to
 // establish the initial connection from the client or host.
 const char kRemoteAccessHostFirewallTraversal[] =
     "remote_access.host_firewall_traversal";
 
 // Boolean controlling whether printing is enabled.
 const char kPrintingEnabled[] = "printing.enabled";
 
 // Boolean controlling whether print preview is disabled.
 const char kPrintPreviewDisabled[] = "printing.print_preview_disabled";
@@ skipping 268 matching lines @@
 const char kRailBreakProportion[] =
     "gesture.rail_break_proportion";
 const char kRailStartProportion[] =
     "gesture.rail_start_proportion";
 #endif
 
 // Indicates whether the browser is in managed mode.
 const char kInManagedMode[] = "managed_mode";
 
 }  // namespace prefs