Copy Smart Lock user preferences to local state so we can access them on the sign-in screen.

chrome/common/extensions/api/easy_unlock_private.idl

Index: chrome/common/extensions/api/easy_unlock_private.idl
diff --git a/chrome/common/extensions/api/easy_unlock_private.idl b/chrome/common/extensions/api/easy_unlock_private.idl
index e7b87150e80875dfd3f3656c68325d97fe361c68..4bfa8f9a0c2d05960e812fad789ea0958df1185c 100644
--- a/chrome/common/extensions/api/easy_unlock_private.idl
+++ b/chrome/common/extensions/api/easy_unlock_private.idl
@@ -143,6 +143,10 @@ namespace easyUnlockPrivate {
     // the signin screen.
     boolean loggedIn;
 
+    // Whether to check if the remote device is in very close proximity before
+    // allowing unlock (~1 feet).
+    boolean checkCloseProximity;
+
     // Whether all data needed to use Easy unlock service has been loaded for
     // the user.
     boolean dataReady;