[Autofill] Enable heuristic detection of credit card issuer fields.

chrome/common/chrome_switches.h

 // 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.
 
 // Defines all the command-line switches used by Chrome.
 
 #ifndef CHROME_COMMON_CHROME_SWITCHES_H_
 #define CHROME_COMMON_CHROME_SWITCHES_H_
 
 #include "build/build_config.h"
@@ skipping 142 matching lines @@
 extern const char kEnableManagedStorage[];
 extern const char kEnableManagedUsers[];
 extern const char kEnableMemoryInfo[];
 extern const char kEnableMemoryInternalsUI[];
 extern const char kEnableMetricsReportingForTesting[];
 extern const char kEnableNaCl[];
 extern const char kEnableNaClDebug[];
 extern const char kEnableNaClExceptionHandling[];
 extern const char kEnableNativeMessaging[];
 extern const char kEnableNetBenchmarking[];
-extern const char kEnableNewAutofillHeuristics[];
 extern const char kEnableNewAutofillUi[];
 extern const char kEnableNpn[];
 extern const char kEnableNpnHttpOnly[];
 extern const char kEnablePanels[];
 extern const char kEnablePanelStacking[];
 extern const char kEnablePasswordGeneration[];
 extern const char kEnablePnacl[];
 extern const char kEnableProfiling[];
 extern const char kEnableQuic[];
 extern const char kEnableQueryExtraction[];
@@ skipping 302 matching lines @@
 #else
 extern const char kEnablePrintPreview[];
 #endif
 
 // DON'T ADD RANDOM STUFF HERE. Put it in the main section above in
 // alphabetical order, or in one of the ifdefs (also in order in each section).
 
 }  // namespace switches
 
 #endif  // CHROME_COMMON_CHROME_SWITCHES_H_