Delete the old hotwording integration.

chrome/browser/ui/app_list/app_list_view_delegate.cc

 // Copyright (c) 2012 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/ui/app_list/app_list_view_delegate.h"
 
 #include <vector>
 
 #include "apps/custom_launcher_page_contents.h"
 #include "base/callback.h"
@@ skipping 642 matching lines @@
 
   // With the new hotword extension, stop the hotword session. With the launcher
   // and NTP, this is unnecessary since the hotwording is implicitly stopped.
   // However, for always on, hotword triggering launches the launcher which
   // starts a session and hence starts the hotword detector. This results in the
   // hotword detector and the speech-to-text engine running in parallel, which
   // will conflict with each other (i.e. saying 'Ok Google' twice in a row
   // should cause a search to happen for 'Ok Google', not two hotword triggers).
   // To get around this, always stop the session when switching to speech
   // recognition.
-  if (HotwordService::IsExperimentalHotwordingEnabled() &&
-      service && service->HotwordEnabled()) {
+  if (service && service->HotwordEnabled()) {
     HotwordService* hotword_service =
         HotwordServiceFactory::GetForProfile(profile_);
     if (hotword_service)
       hotword_service->StopHotwordSession(this);
   }
 }
 
 void AppListViewDelegate::ShowForProfileByPath(
     const base::FilePath& profile_path) {
   controller_->ShowForProfileByPath(profile_path);
@@ skipping 17 matching lines @@
 void AppListViewDelegate::OnSpeechRecognitionStateChanged(
     app_list::SpeechRecognitionState new_state) {
   speech_ui_->SetSpeechRecognitionState(new_state);
 
   app_list::StartPageService* service =
       app_list::StartPageService::Get(profile_);
   // With the new hotword extension, we need to re-request hotwording after
   // speech recognition has stopped. Do not request hotwording after the app
   // list has already closed.
   if (new_state == app_list::SPEECH_RECOGNITION_READY &&
-      HotwordService::IsExperimentalHotwordingEnabled() &&
       service && service->HotwordEnabled() &&
       controller_->GetAppListWindow()) {
     HotwordService* hotword_service =
         HotwordServiceFactory::GetForProfile(profile_);
     if (hotword_service) {
       hotword_service->RequestHotwordSession(this);
     }
   }
 }
 
@@ skipping 132 matching lines @@
 
       // SigninManagerFactory is not a leaky singleton (unlike this class), and
       // its destructor will check that it has no remaining observers.
       scoped_observer_.RemoveAll();
       SigninManagerFactory::GetInstance()->RemoveObserver(this);
       break;
     default:
       NOTREACHED();
   }
 }