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 3a2eec4999d0800f5bb2c664ff1af8ead18e08cb..508ddf8055d0b9ac1cf7ff2cf629b5aa8b7d2696 100644
--- a/chrome/browser/extensions/api/settings_private/prefs_util.cc
+++ b/chrome/browser/extensions/api/settings_private/prefs_util.cc
@@ -333,6 +333,12 @@ 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;