Revert of Revert of Clean up Smart Lock cryptohome keys logic:

chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_api.cc

Index: chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_api.cc
diff --git a/chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_api.cc b/chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_api.cc
index 8375418beede269922ea61b4f9b1822f1137408e..315fb34089a828d6e5abb31eeb17d766cfe33eb8 100644
--- a/chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_api.cc
+++ b/chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_api.cc
@@ -567,15 +567,11 @@
   EXTENSION_FUNCTION_VALIDATE(params.get());
 
   Profile* profile = Profile::FromBrowserContext(browser_context());
-  if (params->devices.empty()) {
-    EasyUnlockService::Get(profile)->ClearRemoteDevices();
-  } else {
-    base::ListValue devices;
-    for (size_t i = 0; i < params->devices.size(); ++i) {
-      devices.Append(params->devices[i]->ToValue().release());
-    }
-    EasyUnlockService::Get(profile)->SetRemoteDevices(devices);
+  base::ListValue devices;
+  for (size_t i = 0; i < params->devices.size(); ++i) {
+    devices.Append(params->devices[i]->ToValue().release());
   }
+  EasyUnlockService::Get(profile)->SetRemoteDevices(devices);
 
   return true;
 }