Revert of Plumbing for login apps device policy to extensions.

chrome/browser/extensions/extension_system_impl.cc

Index: chrome/browser/extensions/extension_system_impl.cc
diff --git a/chrome/browser/extensions/extension_system_impl.cc b/chrome/browser/extensions/extension_system_impl.cc
index bdaf85049b87e4a3dd4302e2aeb140500c708eb3..d15f0ec27437fd6a9cfbeefd4cfb19781b146f2a 100644
--- a/chrome/browser/extensions/extension_system_impl.cc
+++ b/chrome/browser/extensions/extension_system_impl.cc
@@ -206,11 +206,6 @@
   bool autoupdate_enabled = !profile_->IsGuestSession() &&
                             !profile_->IsSystemProfile();
 #if defined(OS_CHROMEOS)
-  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kEnableSigninApps) &&
-      chromeos::ProfileHelper::IsSigninProfile(profile_)) {
-    extensions_enabled = true;
-  }
   if (!extensions_enabled)
     autoupdate_enabled = false;
 #endif  // defined(OS_CHROMEOS)