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A function is also added to check the type of the network the user is
connected to.

CL originally written by radhikabhar@ as 400323002, but not landed before
her internship ended.

BUG=395295
TBR=meacer@chromium.org, dcheng@chromium.org

Review URL: https://codereview.chromium.org/516373003

Cr-Commit-Position: refs/heads/master@{#292767}