Introduce profile for lock screen apps

chrome/browser/signin/easy_unlock_service_factory.cc

Index: chrome/browser/signin/easy_unlock_service_factory.cc
diff --git a/chrome/browser/signin/easy_unlock_service_factory.cc b/chrome/browser/signin/easy_unlock_service_factory.cc
index 9c68aed27545ffefbd962f14cc652d726267c133..5e54dddf70ce4d7e5e148178be005290cc544395 100644
--- a/chrome/browser/signin/easy_unlock_service_factory.cc
+++ b/chrome/browser/signin/easy_unlock_service_factory.cc
@@ -84,6 +84,10 @@ KeyedService* EasyUnlockServiceFactory::BuildServiceInstanceFor(
   int manifest_id = 0;
 
 #if defined(OS_CHROMEOS)
+  if (chromeos::ProfileHelper::IsLockScreenAppProfile(
+          Profile::FromBrowserContext(context))) {
+    return nullptr;
+  }
   if (chromeos::ProfileHelper::IsSigninProfile(
           Profile::FromBrowserContext(context))) {
     if (!context->IsOffTheRecord())