Add flag for single click 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 69f2e4a63dd901808ac4c1adf60f7d450fd5624b..60668af386c26cbb7d03af128daf2bda9b3ce3a5 100644
--- a/components/autofill/core/common/autofill_switches.h
+++ b/components/autofill/core/common/autofill_switches.h
@@ -11,8 +11,10 @@ namespace switches {
 // All switches in alphabetical order. The switches should be documented
 // alongside the definition of their values in the .cc file.
 extern const char kDisablePasswordGeneration[];
+extern const char kDisableSingleClickAutofill[];
 extern const char kDisambiguateAutofillServerNameTypes[];
 extern const char kEnablePasswordGeneration[];
+extern const char kEnableSingleClickAutofill[];
 extern const char kIgnoreAutocompleteOffForAutofill[];
 extern const char kLocalHeuristicsOnlyForPasswordGeneration[];
 extern const char kRespectAutocompleteOffForAutofill[];