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Moving static variables and functions to anonymous namespace.

Bug: None

Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I91789dd354da254dd13410425792321a2608f19c
Reviewed-on: https://chromium-review.googlesource.com/1049587
Commit-Queue: Florin Malita <fmalita@chromium.org>
Reviewed-by: Prashant Nevase <prashant.n@samsung.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Cr-Commit-Position: refs/heads/master@{#569238}