Delete the old hotwording integration.

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

 // Copyright 2014 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/extensions/api/hotword_private/hotword_private_api.h"
 
 #include <string>
 
 #include "base/lazy_instance.h"
 #include "base/prefs/pref_service.h"
@@ skipping 201 matching lines @@
     preamble->sample_data.swap(params->log->buffer);
   }
 
   HotwordService* hotword_service =
       HotwordServiceFactory::GetForProfile(GetProfile());
   if (hotword_service) {
     if (hotword_service->IsTraining()) {
       hotword_service->NotifyHotwordTriggered();
     } else if (hotword_service->client()) {
       hotword_service->client()->OnHotwordRecognized(preamble);
-    } else if (HotwordService::IsExperimentalHotwordingEnabled() &&
-               hotword_service->IsAlwaysOnEnabled()) {
+    } else if (hotword_service->IsAlwaysOnEnabled()) {
       Browser* browser = GetCurrentBrowser();
       // If a Browser does not exist, fall back to the universally available,
       // but not recommended, way.
       AppListService* app_list_service = AppListService::Get(
           browser ? browser->host_desktop_type() : chrome::GetActiveDesktop());
       CHECK(app_list_service);
       app_list_service->ShowForVoiceSearch(GetProfile(), preamble);
     }
   }
   return true;
@@ skipping 219 matching lines @@
 void HotwordPrivateGetAudioHistoryEnabledFunction::SetResultAndSendResponse(
     bool success, bool new_enabled_value) {
   api::hotword_private::AudioHistoryState result;
   result.success = success;
   result.enabled = new_enabled_value;
   SetResult(result.ToValue().release());
   SendResponse(true);
 }
 
 }  // namespace extensions