Adds the audio history and always on hotwording settings.

chrome/browser/search/hotword_service_factory.cc

Index: chrome/browser/search/hotword_service_factory.cc
diff --git a/chrome/browser/search/hotword_service_factory.cc b/chrome/browser/search/hotword_service_factory.cc
index d1a55ed84b9802b23fcdbeba151acb7f5087e7c9..827195bf115505596e210e7b68959ecc441b584c 100644
--- a/chrome/browser/search/hotword_service_factory.cc
+++ b/chrome/browser/search/hotword_service_factory.cc
@@ -98,7 +98,7 @@ void HotwordServiceFactory::RegisterProfilePrefs(
                              false,
                              user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
   // Although this is default true, users will not send back information to
-  // Google unless they have opted in to Hotwording at which point they must
+  // Google unless they have opted into Hotwording at which point they must
   // also confirm that they wish this preference to be true or opt out of it.
   prefs->RegisterBooleanPref(prefs::kHotwordAudioLoggingEnabled,
                              true,
@@ -106,6 +106,9 @@ void HotwordServiceFactory::RegisterProfilePrefs(
   prefs->RegisterStringPref(prefs::kHotwordPreviousLanguage,
                             std::string(),
                             user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
+  prefs->RegisterBooleanPref(prefs::kHotwordAlwaysOnSearchEnabled,

[Matt Giuca, 2014/08/12 08:37:39]

Does not compile without OS_CHROMEOS. Should be guarded by #ifdef (or not -- see
my comment in pref_names.cc).

[kcarattini, 2014/08/13 03:51:53]

Acknowledged.

+                             false,
+                             user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
 }
 
 KeyedService* HotwordServiceFactory::BuildServiceInstanceFor(