Final batch adding real histogram values for extension events.

extensions/browser/api/vpn_provider/vpn_service.h

Index: extensions/browser/api/vpn_provider/vpn_service.h
diff --git a/extensions/browser/api/vpn_provider/vpn_service.h b/extensions/browser/api/vpn_provider/vpn_service.h
index 72c62406daceabee75df8c945129fc63b254bc57..dff70ae854680ed69f9954fd7d0ba6e31f06c0c4 100644
--- a/extensions/browser/api/vpn_provider/vpn_service.h
+++ b/extensions/browser/api/vpn_provider/vpn_service.h
@@ -16,6 +16,7 @@
 #include "chromeos/network/network_configuration_observer.h"
 #include "chromeos/network/network_state_handler_observer.h"
 #include "components/keyed_service/core/keyed_service.h"
+#include "extensions/browser/extension_event_histogram_value.h"
 #include "extensions/browser/extension_registry_observer.h"
 #include "extensions/common/api/vpn_provider.h"
 
@@ -212,6 +213,7 @@ class VpnService : public KeyedService,
   // Send an event with name |event_name| and arguments |event_args| to the
   // extension with id |extension_id|.
   void SendSignalToExtension(const std::string& extension_id,
+                             extensions::events::HistogramValue histogram_value,
                              const std::string& event_name,
                              scoped_ptr<base::ListValue> event_args);