Plumbing for login apps device policy to extensions.

extensions/browser/pref_names.h

Index: extensions/browser/pref_names.h
diff --git a/extensions/browser/pref_names.h b/extensions/browser/pref_names.h
index e221c35cc97b37bf100f5e2b14ccbc5a575b9b09..f77b09a33a66ce33ca1394cb53552b07e249efc3 100644
--- a/extensions/browser/pref_names.h
+++ b/extensions/browser/pref_names.h
@@ -68,6 +68,13 @@ extern const char kInstallDenyList[];
 // accessed through extensions::ExternalPolicyProvider.
 extern const char kInstallForceList[];
 
+// A list containing apps that Chrome will silently install on the sign-in
+// screen on ChromeOS at startup time. It is a list of strings, each string
+// contains an app ID and an update URL, delimited by a semicolon.
+// This preference is set by an admin policy, and meant to be only accessed
+// through extensions::ExternalPolicyProvider.
+extern const char kInstallSigninList[];
+
 // String pref for what version chrome was last time the extension prefs were
 // loaded.
 extern const char kLastChromeVersion[];