Add signal to vpnProvider for platform error

This CL adds an API that can be used to signal the VPN clients of
an error in the platform.

BUG=460428

Review URL: https://codereview.chromium.org/1012503003

Cr-Commit-Position: refs/heads/master@{#321117}

2 files changed, 13 insertions, 0 deletions

diff --git a/extensions/browser/api/vpn_provider/vpn_service.cc b/extensions/browser/api/vpn_provider/vpn_service.cc
index f60cf6a..f849f1f 100644
--- a/extensions/browser/api/vpn_provider/vpn_service.cc
+++ b/extensions/browser/api/vpn_provider/vpn_service.cc
@@ -173,6 +173,15 @@ void VpnService::SendShowConfigureDialogToExtension(
                                  configuration_id));
 }
 
+void VpnService::SendPlatformError(const std::string& extension_id,
+                                   const std::string& configuration_id,
+                                   const std::string& error_message) {
+  SendSignalToExtension(
+      extension_id, api_vpn::OnPlatformMessage::kEventName,
+      api_vpn::OnPlatformMessage::Create(
+          configuration_id, api_vpn::PLATFORM_MESSAGE_ERROR, error_message));
+}
+
 std::string VpnService::GetKey(const std::string& extension_id,
                                const std::string& name) {
   const std::string key = crypto::SHA256HashString(extension_id + name);
diff --git a/extensions/browser/api/vpn_provider/vpn_service.h b/extensions/browser/api/vpn_provider/vpn_service.h
index 92b8b01..96bca6e 100644
--- a/extensions/browser/api/vpn_provider/vpn_service.h
+++ b/extensions/browser/api/vpn_provider/vpn_service.h
@@ -72,6 +72,10 @@ class VpnService : public KeyedService,
   void SendShowConfigureDialogToExtension(const std::string& extension_id,
                                           const std::string& configuration_id);
 
+  void SendPlatformError(const std::string& extension_id,
+                         const std::string& configuration_id,
+                         const std::string& error_message);
+
   // NetworkConfigurationObserver:
   void OnConfigurationCreated(const std::string& service_path,
                               const std::string& profile_path,