Remove more dead app list code.

ui/app_list/app_list_switches.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 "ui/app_list/app_list_switches.h"
 
 #include "base/command_line.h"
 #include "build/build_config.h"
 
 namespace app_list {
@@ skipping 20 matching lines @@
     "enable-drive-search-in-app-launcher";
 const char kDisableDriveSearchInChromeLauncher[] =
     "disable-drive-search-in-app-launcher";
 
 // If set, the app list will forget it has been installed on startup. Note this
 // doesn't prevent the app list from running, it just makes Chrome think the app
 // list hasn't been enabled (as in kEnableAppList) yet.
 const char kResetAppListInstallState[] = "reset-app-list-install-state";
 
 bool IsAppListSyncEnabled() {
-#if defined(OS_MACOSX)
-  return base::CommandLine::ForCurrentProcess()->HasSwitch(kEnableSyncAppList);
-#endif
   return !base::CommandLine::ForCurrentProcess()->HasSwitch(
       kDisableSyncAppList);
 }
 
 bool IsFolderUIEnabled() {
   // Folder UI is available only when AppList sync is enabled, and should
   // not be disabled separately.
   return IsAppListSyncEnabled();
 }
 
 bool IsVoiceSearchEnabled() {
   // Speech recognition in AppList is only for ChromeOS right now.
-#if defined(OS_CHROMEOS)
   return true;
-#else
-  return false;
-#endif
 }
 
 bool ShouldNotDismissOnBlur() {
   return base::CommandLine::ForCurrentProcess()->HasSwitch(
       kDisableAppListDismissOnBlur);
 }
 
 bool IsDriveAppsInAppListEnabled() {
-#if defined(OS_CHROMEOS)
   return true;
-#else
-  return false;
-#endif
 }
 
 bool IsDriveSearchInChromeLauncherEnabled() {
-#if defined(OS_CHROMEOS)
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           kEnableDriveSearchInChromeLauncher))
     return true;
 
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           kDisableDriveSearchInChromeLauncher))
     return false;
 
   return true;
-#else
-  return false;
-#endif
 }
 
 }  // namespace switches
 }  // namespace app_list