Enable networking.onc for stable channel

extensions/browser/api/networking_private/networking_private_api.cc

Index: extensions/browser/api/networking_private/networking_private_api.cc
diff --git a/extensions/browser/api/networking_private/networking_private_api.cc b/extensions/browser/api/networking_private/networking_private_api.cc
index d887a397311eabb6f3ff3af9b574eb218e557a8b..33015b240e80245cb2b718248d629bf5d7a449f6 100644
--- a/extensions/browser/api/networking_private/networking_private_api.cc
+++ b/extensions/browser/api/networking_private/networking_private_api.cc
@@ -643,6 +643,11 @@ NetworkingPrivateStartActivateFunction::
 
 ExtensionFunction::ResponseAction
 NetworkingPrivateStartActivateFunction::Run() {
+  if (!HasPrivateNetworkingAccess(extension(), source_context_type(),
+                                  source_url())) {
+    return RespondNow(Error(kPrivateOnlyError));
+  }
+
   std::unique_ptr<private_api::StartActivate::Params> params =
       private_api::StartActivate::Params::Create(*args_);
   EXTENSION_FUNCTION_VALIDATE(params);
@@ -945,6 +950,11 @@ NetworkingPrivateUnlockCellularSimFunction::
 
 ExtensionFunction::ResponseAction
 NetworkingPrivateUnlockCellularSimFunction::Run() {
+  if (!HasPrivateNetworkingAccess(extension(), source_context_type(),
+                                  source_url())) {
+    return RespondNow(Error(kPrivateOnlyError));
+  }
+
   std::unique_ptr<private_api::UnlockCellularSim::Params> params =
       private_api::UnlockCellularSim::Params::Create(*args_);
   EXTENSION_FUNCTION_VALIDATE(params);
@@ -979,6 +989,11 @@ NetworkingPrivateSetCellularSimStateFunction::
 
 ExtensionFunction::ResponseAction
 NetworkingPrivateSetCellularSimStateFunction::Run() {
+  if (!HasPrivateNetworkingAccess(extension(), source_context_type(),
+                                  source_url())) {
+    return RespondNow(Error(kPrivateOnlyError));
+  }
+
   std::unique_ptr<private_api::SetCellularSimState::Params> params =
       private_api::SetCellularSimState::Params::Create(*args_);
   EXTENSION_FUNCTION_VALIDATE(params);