arc-app-launcher: Minimal support for ARC app launcher.

chrome/browser/prefs/browser_prefs.cc

Index: chrome/browser/prefs/browser_prefs.cc
diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index ee136d2b1e606bc518e261d6bf98394761d5b77d..a74cf817c8a74a8a92f1e0dd4f7ada3cfe022401 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -200,6 +200,7 @@
 #endif
 
 #if defined(OS_CHROMEOS) && defined(ENABLE_APP_LIST)
+#include "chrome/browser/ui/app_list/arc/arc_app_list_prefs.h"
 #include "chrome/browser/ui/app_list/google_now_extension.h"
 #endif
 
@@ -503,6 +504,10 @@ void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry) {
   flags_ui::PrefServiceFlagsStorage::RegisterProfilePrefs(registry);
 #endif
 
+#if defined(OS_CHROMEOS) && defined(ENABLE_APP_LIST)
+  ArcAppListPrefs::RegisterProfilePrefs(registry);
+#endif
+
 #if defined(OS_WIN)
   component_updater::RegisterProfilePrefsForSwReporter(registry);
   NetworkProfileBubble::RegisterProfilePrefs(registry);