Remove more dead app list code.

ui/app_list/app_list_switches.cc

Index: ui/app_list/app_list_switches.cc
diff --git a/ui/app_list/app_list_switches.cc b/ui/app_list/app_list_switches.cc
index 121ca279ac42a3326c76ca4765c04347103e136d..3d16aa6ee6471f54e318d88fc7eb4b363178ed01 100644
--- a/ui/app_list/app_list_switches.cc
+++ b/ui/app_list/app_list_switches.cc
@@ -38,9 +38,6 @@ const char kDisableDriveSearchInChromeLauncher[] =
 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);
 }
@@ -53,11 +50,7 @@ bool IsFolderUIEnabled() {
 
 bool IsVoiceSearchEnabled() {
   // Speech recognition in AppList is only for ChromeOS right now.
-#if defined(OS_CHROMEOS)
   return true;
-#else
-  return false;
-#endif
 }
 
 bool ShouldNotDismissOnBlur() {
@@ -66,15 +59,10 @@ bool ShouldNotDismissOnBlur() {
 }
 
 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;
@@ -84,9 +72,6 @@ bool IsDriveSearchInChromeLauncherEnabled() {
     return false;
 
   return true;
-#else
-  return false;
-#endif
 }
 
 }  // namespace switches