Due to the dictionary refactoring we ended up calling the superclass' helper
which in turn made us decode the values wrongly for the GlobalDictionary.

Change-Id: I4298b6a437ef2d84b69b7e980470c3cf5af79944
Reviewed-on: https://chromium-review.googlesource.com/561701Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46449}