Remove the first-run search engine dialog/ballot.

chrome/installer/util/master_preferences_constants.cc

 // Copyright (c) 2012 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/installer/util/master_preferences_constants.h"
 
 namespace installer {
 namespace master_preferences {
   const char kAltShortcutText[] = "alternate_shortcut_text";
   const char kAutoLaunchChrome[] = "auto_launch_chrome";
@@ skipping 16 matching lines @@
   const char kDoNotCreateShortcuts[] = "do_not_create_shortcuts";
   const char kDoNotLaunchChrome[] = "do_not_launch_chrome";
   const char kDoNotRegisterForUpdateLaunch[] =
       "do_not_register_for_update_launch";
   const char kLogFile[] = "log_file";
   const char kMakeChromeDefault[] = "make_chrome_default";
   const char kMakeChromeDefaultForUser[] = "make_chrome_default_for_user";
   const char kMsi[] = "msi";
   const char kMultiInstall[] = "multi_install";
   const char kRequireEula[] = "require_eula";
-  const char kSearchEngineExperimentPref[] = "search_engine_experiment";
-  const char kSearchEngineExperimentRandomizePref[] =
-      "search_engine_experiment_randomize";
   const char kSystemLevel[] = "system_level";
   const char kVerboseLogging[] = "verbose_logging";
   const char kExtensionsBlock[] = "extensions.settings";
 }  // namespace master_preferences
 }  // namespace installer