Make availability of hotword hardware known to hotword component extension.

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 142 matching lines @@
 
   HotwordService* hotword_service =
       HotwordServiceFactory::GetForProfile(GetProfile());
   if (!hotword_service) {
     result.available = false;
     result.always_on_available = false;
     result.enabled = false;
     result.audio_logging_enabled = false;
     result.always_on_enabled = false;
     result.user_is_active = false;
+    result.hotword_hardware_available = false;
   } else {
     result.available = false;
     result.always_on_available = false;
     if (params->get_optional_fields && *params->get_optional_fields) {
       result.available = hotword_service->IsServiceAvailable();
       result.always_on_available =
           HotwordServiceFactory::IsAlwaysOnAvailable();
     }
     result.enabled = hotword_service->IsSometimesOnEnabled();
     result.audio_logging_enabled = hotword_service->IsOptedIntoAudioLogging();
     result.training_enabled = hotword_service->IsTraining();
     result.always_on_enabled = hotword_service->IsAlwaysOnEnabled();
     result.user_is_active = hotword_service->UserIsActive();
+    result.hotword_hardware_available =
+        HotwordService::IsHotwordHardwareAvailable();
   }
 
   PrefService* prefs = GetProfile()->GetPrefs();
   result.enabled_set = prefs->HasPrefPath(prefs::kHotwordSearchEnabled);
 
   SetResult(result.ToValue().release());
   return true;
 }
 
 bool HotwordPrivateSetHotwordSessionStateFunction::RunSync() {
@@ skipping 267 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