Add a flag to ignore autocomplete="off" for Autofill.

components/autofill/core/common/autofill_switches.h

Index: components/autofill/core/common/autofill_switches.h
diff --git a/components/autofill/core/common/autofill_switches.h b/components/autofill/core/common/autofill_switches.h
index 9cab817ae86c91aeabcb2c9460c57309778ab390..f94a2dfd2ae810aa2cc9c51c1b1ae9140856c916 100644
--- a/components/autofill/core/common/autofill_switches.h
+++ b/components/autofill/core/common/autofill_switches.h
@@ -13,6 +13,7 @@ namespace switches {
 extern const char kDisableIgnoreAutocompleteOff[];
 extern const char kDisablePasswordGeneration[];
 extern const char kEnablePasswordGeneration[];
+extern const char kIgnoreAutocompleteOffForAutofill[];
 extern const char kLocalHeuristicsOnlyForPasswordGeneration[];
 extern const char kShowAutofillTypePredictions[];
 extern const char kWalletSecureServiceUrl[];