Clean up unused constant globals

chrome/browser/apps/app_launcher_util.cc

 // Copyright 2013 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/apps/app_launcher_util.h"
 
 #include "base/metrics/field_trial.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/ui/host_desktop.h"
 #include "chrome/common/pref_names.h"
 
 namespace {
 
+#if defined(ENABLE_APP_LIST)
 // The field trial group name that enables showing the promo.
 const char kShowLauncherPromoOnceGroupName[] = "ShowPromoUntilDismissed";
 
 // The field trial group name that resets the pref to show the app launcher
 // promo on every session startup.
 const char kResetShowLauncherPromoPrefGroupName[] = "ResetShowPromoPref";
 
 // The name of the field trial that controls showing the app launcher promo.
 const char kLauncherPromoTrialName[] = "ShowAppLauncherPromo";
+#endif  // defined(ENABLE_APP_LIST)
 
 }  // namespace
 
 void SetupShowAppLauncherPromoFieldTrial(PrefService* local_state) {
 #if defined(ENABLE_APP_LIST)
   if (base::FieldTrialList::FindFullName(kLauncherPromoTrialName) ==
       kResetShowLauncherPromoPrefGroupName) {
     local_state->SetBoolean(prefs::kShowAppLauncherPromo, true);
   }
 #endif
@@ skipping 25 matching lines @@
   if (!local_state)
     return false;
   std::string app_launcher_promo_group_name =
       base::FieldTrialList::FindFullName(kLauncherPromoTrialName);
   return !IsAppLauncherEnabled() &&
       local_state->GetBoolean(prefs::kShowAppLauncherPromo) &&
       (app_launcher_promo_group_name == kShowLauncherPromoOnceGroupName ||
        app_launcher_promo_group_name == kResetShowLauncherPromoPrefGroupName);
 #endif
 }  // namespace apps