fido/bio: add CLI feature flag for bio enrollment

Bug: 974046
Change-Id: Id651875e837a8f5b375c1e6e0e76b45e848a595d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1660955Reviewed-by: Kim Paulhamus <kpaulhamus@chromium.org>
Reviewed-by: Martin Kreichgauer <martinkr@google.com>
Commit-Queue: Matthew Webb <noviv@google.com>
Auto-Submit: Matthew Webb <noviv@google.com>
Cr-Commit-Position: refs/heads/master@{#670205}

device/fido/features.cc

@@ -22,4 +22,7 @@ extern const base::Feature kWebAuthPINSupport{"WebAuthenticationPINSupport",
 extern const base::Feature kWebAuthResidentKeys{
     "WebAuthenticationResidentKeys", base::FEATURE_ENABLED_BY_DEFAULT};
 
+extern const base::Feature kWebAuthBiometricEnrollment{
+    "WebAuthenticationBiometricEnrollment", base::FEATURE_DISABLED_BY_DEFAULT};
+
 }  // namespace device

device/fido/features.h

@@ -24,6 +24,10 @@ extern const base::Feature kWebAuthPINSupport;
 COMPONENT_EXPORT(DEVICE_FIDO)
 extern const base::Feature kWebAuthResidentKeys;
 
+// Enable biometric enrollment in the security keys settings UI.
+COMPONENT_EXPORT(DEVICE_FIDO)
+extern const base::Feature kWebAuthBiometricEnrollment;
+
 }  // namespace device
 
 #endif  // DEVICE_FIDO_FEATURES_H_