MD Settings: Add Hotword (OK Google) section to search_page

chrome/browser/extensions/api/settings_private/prefs_util.cc

Index: chrome/browser/extensions/api/settings_private/prefs_util.cc
diff --git a/chrome/browser/extensions/api/settings_private/prefs_util.cc b/chrome/browser/extensions/api/settings_private/prefs_util.cc
index d1c52cca455b66711dfa960f728f22a12e806867..bc6fc3af47815957c1de75449c0418d5fc174980 100644
--- a/chrome/browser/extensions/api/settings_private/prefs_util.cc
+++ b/chrome/browser/extensions/api/settings_private/prefs_util.cc
@@ -329,6 +329,12 @@ const PrefsUtil::TypedPrefMap& PrefsUtil::GetWhitelistedKeys() {
       settings_private::PrefType::PREF_TYPE_BOOLEAN;
 #endif
 
+  // Search settings.
+  (*s_whitelist)[::prefs::kHotwordSearchEnabled] =
+      settings_private::PrefType::PREF_TYPE_BOOLEAN;
+  (*s_whitelist)[::prefs::kHotwordAlwaysOnSearchEnabled] =
+      settings_private::PrefType::PREF_TYPE_BOOLEAN;
+
   // Proxy settings.
   (*s_whitelist)[proxy_config::prefs::kProxy] =
       settings_private::PrefType::PREF_TYPE_DICTIONARY;