Expose always-on hotword preference via hotwordPrivate API.

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 "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 14 matching lines @@
     LAZY_INSTANCE_INITIALIZER;
 
 HotwordPrivateEventService::HotwordPrivateEventService(
     content::BrowserContext* context)
     : profile_(Profile::FromBrowserContext(context)) {
   pref_change_registrar_.Init(profile_->GetPrefs());
   pref_change_registrar_.Add(
       prefs::kHotwordSearchEnabled,
       base::Bind(&HotwordPrivateEventService::OnEnabledChanged,
                  base::Unretained(this)));
+  pref_change_registrar_.Add(
+      prefs::kHotwordAlwaysOnSearchEnabled,
+      base::Bind(&HotwordPrivateEventService::OnEnabledChanged,
+                 base::Unretained(this)));
 }
 
 HotwordPrivateEventService::~HotwordPrivateEventService() {
 }
 
 void HotwordPrivateEventService::Shutdown() {
 }
 
 // static
 BrowserContextKeyedAPIFactory<HotwordPrivateEventService>*
 HotwordPrivateEventService::GetFactoryInstance() {
   return g_factory.Pointer();
 }
 
 // static
 const char* HotwordPrivateEventService::service_name() {
   return "HotwordPrivateEventService";
 }
 
 void HotwordPrivateEventService::OnEnabledChanged(
     const std::string& pref_name) {
-  DCHECK_EQ(pref_name, std::string(prefs::kHotwordSearchEnabled));
+  DCHECK(pref_name == std::string(prefs::kHotwordSearchEnabled) ||
+         pref_name == std::string(prefs::kHotwordAlwaysOnSearchEnabled));
   SignalEvent(OnEnabledChanged::kEventName);
 }
 
 void HotwordPrivateEventService::OnHotwordSessionRequested() {
   SignalEvent(api::hotword_private::OnHotwordSessionRequested::kEventName);
 }
 
 void HotwordPrivateEventService::OnHotwordSessionStopped() {
   SignalEvent(api::hotword_private::OnHotwordSessionStopped::kEventName);
 }
@@ skipping 33 matching lines @@
   HotwordService* hotword_service =
       HotwordServiceFactory::GetForProfile(GetProfile());
   if (!hotword_service)
     result.available = false;
   else
     result.available = hotword_service->IsServiceAvailable();
 
   PrefService* prefs = GetProfile()->GetPrefs();
   result.enabled_set = prefs->HasPrefPath(prefs::kHotwordSearchEnabled);
   result.enabled = prefs->GetBoolean(prefs::kHotwordSearchEnabled);
+  result.always_on_enabled =
+      prefs->GetBoolean(prefs::kHotwordAlwaysOnSearchEnabled);
   result.audio_logging_enabled = false;
   CommandLine* command_line = CommandLine::ForCurrentProcess();
   result.experimental_hotword_enabled = command_line->HasSwitch(
       switches::kEnableExperimentalHotwording);
   if (hotword_service)
     result.audio_logging_enabled = hotword_service->IsOptedIntoAudioLogging();
 
   SetResult(result.ToValue().release());
   return true;
 }
@@ skipping 12 matching lines @@
 
 bool HotwordPrivateNotifyHotwordRecognitionFunction::RunSync() {
   HotwordService* hotword_service =
       HotwordServiceFactory::GetForProfile(GetProfile());
   if (hotword_service && hotword_service->client())
     hotword_service->client()->OnHotwordRecognized();
   return true;
 }
 
 }  // namespace extensions