Check that the user is signed in and the app has oauth2 section before recording an aouth2 grant.

chrome/browser/extensions/extension_service.cc

Index: chrome/browser/extensions/extension_service.cc
===================================================================
--- chrome/browser/extensions/extension_service.cc	(revision 161131)
+++ chrome/browser/extensions/extension_service.cc	(working copy)
@@ -2078,11 +2078,8 @@
 
   // Silently grant all active permissions to default apps only on install.
   // After install they should behave like other apps.
-  if (is_default_app_install) {
-    // Not recording any OAuth2 grants since no default apps need them. See
-    // http://crbug.com/154896 for a better way of checking this.
-    GrantPermissions(extension, false);
-  }
+  if (is_default_app_install)
+    GrantPermissions(extension, true);
 
   if (is_extension_upgrade) {
     // Other than for unpacked extensions, CrxInstaller should have guaranteed