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

Review URL: https://chromiumcodereview.appspot.com/11066125

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@161643 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/extension_service.cc b/chrome/browser/extensions/extension_service.cc
index 15c9535..e04296a 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -2084,11 +2084,8 @@
 
   // 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