Remove support for the keygen tag

components/content_settings/core/common/pref_names.cc

Index: components/content_settings/core/common/pref_names.cc
diff --git a/components/content_settings/core/common/pref_names.cc b/components/content_settings/core/common/pref_names.cc
index 36a7e628b32b706ba91bcf7791ee0aa35219c39b..08bb3112b88d5b920ea191b36b7e1468b6662d2c 100644
--- a/components/content_settings/core/common/pref_names.cc
+++ b/components/content_settings/core/common/pref_names.cc
@@ -42,8 +42,6 @@ const char kManagedDefaultPluginsSetting[] =
     "profile.managed_default_content_settings.plugins";
 const char kManagedDefaultPopupsSetting[] =
     "profile.managed_default_content_settings.popups";
-const char kManagedDefaultKeygenSetting[] =
-    "profile.managed_default_content_settings.keygen";
 const char kManagedDefaultWebBluetoothGuardSetting[] =
     "profile.managed_default_content_settings.web_bluetooth_guard";
 
@@ -77,9 +75,4 @@ const char kManagedPopupsAllowedForUrls[] =
     "profile.managed_popups_allowed_for_urls";
 const char kManagedPopupsBlockedForUrls[] =
     "profile.managed_popups_blocked_for_urls";
-const char kManagedKeygenAllowedForUrls[] =
-    "profile.managed_keygen_allowed_for_urls";
-const char kManagedKeygenBlockedForUrls[] =
-    "profile.managed_keygen_blocked_for_urls";
-
 }  // namespace prefs