[jumbo] Use full namespaces to clarify which GetReferrerChain is needed

There are two namespaces in extensions named GetRefererrChain and
in jumbo builds the identically named namespace aliases create for
them clashed. This just uses the full namespace name instead of
using aliases so that it's always clear (to compiler and humans)
which one is used.

Bug: 914411
Change-Id: I43336e962a82756bf4be7db74417c6a1fc78e889
Reviewed-on: https://chromium-review.googlesource.com/c/1472571
Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Commit-Queue: Daniel Bratell <bratell@opera.com>
Cr-Commit-Position: refs/heads/master@{#632368}
2 files changed