Replace base::MakeUnique with std::make_unique in net/.

base/memory/ptr_util.h includes will be cleaned up later.

Bug: 755727
Change-Id: Ibaf46f05c9b02b76f9a91e819984b087a8c0d434
Reviewed-on: https://chromium-review.googlesource.com/627300
Commit-Queue: Jeremy Roman <jbroman@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Bence Béky <bnc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#498123}
void NetworkChangeNotifierMac::Forwarder::Init()  {
  net_config_watcher_->SetInitialConnectionType();
}

void NetworkChangeNotifierMac::Forwarder::Init()  {
  net_config_watcher_->SetInitialConnectionType();
}
