Hotword Private API: Add function and event to query the existence of a speaker model

chrome/browser/extensions/api/hotword_private/hotword_private_api.cc

Index: chrome/browser/extensions/api/hotword_private/hotword_private_api.cc
diff --git a/chrome/browser/extensions/api/hotword_private/hotword_private_api.cc b/chrome/browser/extensions/api/hotword_private/hotword_private_api.cc
index 04e032b9646e442d607e52f8a976e11a40f786c0..04c16a6bc35672380f727878e4861c5e5fa04bb0 100644
--- a/chrome/browser/extensions/api/hotword_private/hotword_private_api.cc
+++ b/chrome/browser/extensions/api/hotword_private/hotword_private_api.cc
@@ -102,6 +102,10 @@ void HotwordPrivateEventService::OnDeleteSpeakerModel() {
   SignalEvent(api::hotword_private::OnDeleteSpeakerModel::kEventName);
 }
 
+void HotwordPrivateEventService::OnSpeakerModelExists() {
+  SignalEvent(api::hotword_private::OnSpeakerModelExists::kEventName);
+}
+
 void HotwordPrivateEventService::SignalEvent(const std::string& event_name) {
   EventRouter* router = EventRouter::Get(profile_);
   if (!router || !router->HasEventListener(event_name))
@@ -462,4 +466,18 @@ void HotwordPrivateGetAudioHistoryEnabledFunction::SetResultAndSendResponse(
   SendResponse(true);
 }
 
+bool HotwordPrivateSpeakerModelExistsResultFunction::RunSync() {
+  scoped_ptr<api::hotword_private::SpeakerModelExistsResult::Params> params(
+      api::hotword_private::SpeakerModelExistsResult::Params::Create(*args_));
+  EXTENSION_FUNCTION_VALIDATE(params.get());
+
+  HotwordService* hotword_service =
+      HotwordServiceFactory::GetForProfile(GetProfile());
+  if (!hotword_service)
+    return false;
+
+  hotword_service->SpeakerModelExistsComplete(params->exists);
+  return true;
+}
+
 }  // namespace extensions