Remove unused "is_beacon" from PingLoader

The function parameter and the corresponding member variable are completely
useless, as the former is ignored and the latter is always set to true.

Bug: 695939
Change-Id: I5d101a096beacef112989ce6c624b96ddd62ae06
Reviewed-on: https://chromium-review.googlesource.com/517809
Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
Reviewed-by: Takeshi Yoshino <tyoshino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#475432}
1 file changed