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

chrome/browser/search/hotword_service.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/search/hotword_service.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/i18n/case_conversion.h"
@@ skipping 726 matching lines @@
 void HotwordService::OptIntoHotwording(
     const LaunchMode& launch_mode) {
   // First determine if we actually need to launch the app, or can just enable
   // the pref. If Audio History has already been enabled, and we already have
   // a speaker model, then we don't need to launch the app at all.
   if (launch_mode == HotwordService::HOTWORD_ONLY) {
     HotwordPrivateEventService* event_service =
         BrowserContextKeyedAPIFactory<HotwordPrivateEventService>::Get(
             profile_);
     if (event_service) {
-      // TODO(kcarattini): add this call once it's implemented in the API.
-      // event_service->SpeakerModelExists();
+      event_service->OnSpeakerModelExists();
       return;
     }
   }
 
   LaunchHotwordAudioVerificationApp(launch_mode);
 }
 
 void HotwordService::LaunchHotwordAudioVerificationApp(
     const LaunchMode& launch_mode) {
   hotword_audio_verification_launch_mode_ = launch_mode;
@@ skipping 174 matching lines @@
   // Only support multiple profiles and profile switching in ChromeOS.
   if (user_manager::UserManager::IsInitialized()) {
     user_manager::User* user =
         user_manager::UserManager::Get()->GetActiveUser();
     if (user && user->is_profile_created())
       return profile_ == ProfileManager::GetActiveUserProfile();
   }
 #endif
   return true;
 }