Move enable_app_list to a buildflag.

chrome/common/pref_names.h

 // 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.
 
 // Constants for the names of various preferences, for easier changing.
 
 #ifndef CHROME_COMMON_PREF_NAMES_H_
 #define CHROME_COMMON_PREF_NAMES_H_
 
 #include <stddef.h>
 
 #include "build/build_config.h"
 #include "chrome/common/features.h"
 
 namespace prefs {
 
 // Profile prefs. Please add Local State prefs below instead.
-#if defined(OS_CHROMEOS) && defined(ENABLE_APP_LIST)
+#if defined(OS_CHROMEOS) && BUILDFLAG(ENABLE_APP_LIST)
 extern const char kArcApps[];
 extern const char kArcBackupRestoreEnabled[];
 extern const char kArcEnabled[];
 extern const char kArcLocationServiceEnabled[];
 extern const char kArcPackages[];
 extern const char kArcSetNotificationsEnabledDeferred[];
 extern const char kArcSignedIn[];
 #endif
 extern const char kChildAccountStatusKnown[];
 extern const char kDefaultApps[];
@@ skipping 722 matching lines @@
 #if defined(OS_WIN)
 extern const char kNetworkProfileWarningsLeft[];
 extern const char kNetworkProfileLastWarningTime[];
 #endif
 
 #if defined(OS_CHROMEOS)
 extern const char kRLZBrand[];
 extern const char kRLZDisabled[];
 #endif
 
-#if defined(ENABLE_APP_LIST)
+#if BUILDFLAG(ENABLE_APP_LIST)
 extern const char kAppListProfile[];
 extern const char kLastAppListLaunchPing[];
 extern const char kAppListLaunchCount[];
 extern const char kLastAppListAppLaunchPing[];
 extern const char kAppListAppLaunchCount[];
 extern const char kAppLauncherHasBeenEnabled[];
 extern const char kAppListEnableMethod[];
 extern const char kAppListEnableTime[];
 #if defined(OS_MACOSX)
 extern const char kAppLauncherShortcutVersion[];
 #endif
 extern const char kShowAppLauncherPromo[];
 extern const char kAppLauncherDriveAppMapping[];
 extern const char kAppLauncherUninstalledDriveApps[];
-#endif  // defined(ENABLE_APP_LIST)
+#endif  // BUILDFLAG(ENABLE_APP_LIST)
 
 #if defined(OS_WIN)
 extern const char kAppLaunchForMetroRestart[];
 extern const char kAppLaunchForMetroRestartProfile[];
 #endif
 extern const char kAppShortcutsVersion[];
 
 extern const char kModuleConflictBubbleShown[];
 
 extern const char kDRMSalt[];
@@ skipping 46 matching lines @@
 #endif
 
 extern const char kOriginTrialPublicKey[];
 extern const char kOriginTrialDisabledFeatures[];
 
 extern const char kComponentUpdatesEnabled[];
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_