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By default SimpleURLLoader does not attach cookies while sending
request, but for contextual suggestion service, the auth cookies are
required, otherwise it responses empty result.

Bug: 904742
Change-Id: I6d061c859cda9804fe7372634aae5c5d46916ea1
Reviewed-on: https://chromium-review.googlesource.com/c/1333017
Commit-Queue: Pengcheng Xu <pengcheng@google.com>
Reviewed-by: Mark Pearson <mpearson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611118}