Enable brand codes and master preferences on the Mac.

chrome/browser/first_run/first_run_mac.mm

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/first_run/first_run.h"
 
 #include "base/file_path.h"
+#include "base/string_util.h"
+#include "chrome/browser/mac/keystone_glue.h"
+#include "chrome/browser/mac/master_prefs.h"
 
 bool FirstRun::ImportBookmarks(const FilePath& import_bookmarks_path) {
   // http://crbug.com/48880
   return false;
 }
 
 // static
 bool FirstRun::IsOrganicFirstRun() {
-  // We treat all installs as organic.
-  return true;
+  std::string brand = keystone_glue::BrandCode();
+  return brand.empty() ||
+         StartsWithASCII(brand, "GG", true) ||
+         StartsWithASCII(brand, "EU", true);
 }
 
 // static
 void FirstRun::PlatformSetup() {
   // Things that Windows does here (creating a desktop icon, for example) are
   // not needed.
 }
+
+// static
+FilePath FirstRun::MasterPrefsPath() {
+  return master_prefs::MasterPrefsPath();
+}