Revert of Simplify the registration of the Chrome Recovery component.

chrome/browser/component_updater/recovery_component_installer.cc

Index: chrome/browser/component_updater/recovery_component_installer.cc
diff --git a/chrome/browser/component_updater/recovery_component_installer.cc b/chrome/browser/component_updater/recovery_component_installer.cc
index 9f4e58de3af7f4a55f6d9fb8a81bde76a46738c9..868e5c7e9a1613980a612fc7ffc2caccc0389417 100644
--- a/chrome/browser/component_updater/recovery_component_installer.cc
+++ b/chrome/browser/component_updater/recovery_component_installer.cc
@@ -493,8 +493,7 @@
 
 void RegisterRecoveryComponent(ComponentUpdateService* cus,
                                PrefService* prefs) {
-#if defined(GOOGLE_CHROME_BUILD)
-#if defined(OS_WIN) || defined(OS_MACOSX)
+#if !defined(OS_CHROMEOS) && defined(GOOGLE_CHROME_BUILD)
   if (SimulatingElevatedRecovery()) {
     BrowserThread::PostTask(
         BrowserThread::UI,
@@ -509,8 +508,7 @@
       FROM_HERE,
       base::Bind(&RecoveryRegisterHelper, cus, prefs),
       base::TimeDelta::FromSeconds(6));
-#endif
-#endif
+#endif  // !defined(OS_CHROMEOS) && defined(GOOGLE_CHROME_BUILD)
 }
 
 void RegisterPrefsForRecoveryComponent(PrefRegistrySimple* registry) {