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 90a759972c8f29d74734e13a65b7c2cf1cef8333..34e23719457eb533ee4945ed1ba9a9ff08d01d2f 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -224,6 +224,10 @@
 #include "chrome/browser/ui/startup/default_browser_prompt.h"
 #endif
 
+#if defined(ENABLE_ARC)
+#include "chrome/browser/ui/app_list/arc/arc_app_list_prefs.h"
+#endif
+
 namespace {
 
 #if defined(OS_WIN)
@@ -493,6 +497,10 @@ void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry) {
   FlagsUI::RegisterProfilePrefs(registry);
 #endif
 
+#if defined(ENABLE_ARC)
+  ArcAppListPrefs::RegisterProfilePrefs(registry);
+#endif
+
 #if defined(OS_WIN)
   component_updater::RegisterProfilePrefsForSwReporter(registry);
   NetworkProfileBubble::RegisterProfilePrefs(registry);