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From discussion on chromium-dev, it was decided to remove 'chrome'
namespace.

Bug: 289619
Change-Id: I4b06495e341b6f75cce89d06f92a18fc4826cac1
Reviewed-on: https://chromium-review.googlesource.com/766088Reviewed-by: Ted Choc <tedchoc@chromium.org>
Reviewed-by: Anthony Berent <aberent@chromium.org>
Commit-Queue: srirama chandra sekhar <srirama.m@samsung.com>
Cr-Commit-Position: refs/heads/master@{#517804}