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

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 00609aaf3ee5d5ee57f830f1a853afc5b28a1a9a..282c556b8e7dff4d18aa0fefeb92d8c1a20c4233 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -569,9 +569,6 @@ const char kEnableNetBenchmarking[]            = "enable-net-benchmarking";
 // part of the renderer process.  http://crbug.com/51644
 const char kEnableNewAutofillUi[]           = "enable-new-autofill-ui";
 
-// Enables new Autofill heuristics, such as adding support for new field types.
-const char kEnableNewAutofillHeuristics[]   = "enable-new-autofill-heuristics";
-
 // Enables NPN and SPDY. In case server supports SPDY, browser will use SPDY.
 const char kEnableNpn[]                     = "enable-npn";