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 3e5e7a2d2cdee77e8fc38329f87449587dfcd14e..202dfa129d1582632759aa52b725c5664e308dcc 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
 
@@ -494,6 +495,10 @@ 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);