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

chrome/browser/search/hotword_service.h

 // 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.
 
 #ifndef CHROME_BROWSER_SEARCH_HOTWORD_SERVICE_H_
 #define CHROME_BROWSER_SEARCH_HOTWORD_SERVICE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 128 matching lines @@
   //
   // TODO(kcarattini): Remove this when
   // https://code.google.com/p/chromium/issues/detail?id=165573 is fixed,
   // at which time we can simply launch the app in the given mode instead of
   // having to check for it here.
   enum LaunchMode {
     HOTWORD_ONLY,
     HOTWORD_AND_AUDIO_HISTORY,
     RETRAIN
   };
+  void OptIntoHotwording(const LaunchMode& launch_mode);
   void LaunchHotwordAudioVerificationApp(const LaunchMode& launch_mode);
   virtual LaunchMode GetHotwordAudioVerificationLaunchMode();
 
+  // Called when the SpeakerModelExists request is complete. Either
+  // sets the always-on hotword pref to true, or launches the Hotword
+  // Audio Verification App, depending on the value of |exists|.
+  void SpeakerModelExistsComplete(bool exists);
+
   // These methods control the speaker training communication between
   // the Hotword Audio Verification App and the Hotword Extension that
   // contains the NaCl module.
   void StartTraining();
   void FinalizeSpeakerModel();
   void StopTraining();
   void NotifyHotwordTriggered();
 
   // Returns true if speaker training is currently in progress.
   bool IsTraining();
@@ skipping 58 matching lines @@
 
   // The WeakPtrFactory should be the last member, so the weak pointer
   // gets invalidated before the destructors for other members run,
   // to avoid callbacks into a half-destroyed object.
   base::WeakPtrFactory<HotwordService> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(HotwordService);
 };
 
 #endif  // CHROME_BROWSER_SEARCH_HOTWORD_SERVICE_H_