[Mac] Use CoreWLAN directly now that macOS 10.9 is the minimum version.

device/geolocation/wifi_data_provider_mac.cc

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "device/geolocation/wifi_data_provider_mac.h"
-
-#include "device/geolocation/wifi_data_provider_common.h"
-#include "device/geolocation/wifi_data_provider_manager.h"
-
-namespace device {
-namespace {
-// The time periods, in milliseconds, between successive polls of the wifi data.
-const int kDefaultPollingInterval = 120000;                // 2 mins
-const int kNoChangePollingInterval = 300000;               // 5 mins
-const int kTwoNoChangePollingInterval = 600000;            // 10 mins
-const int kNoWifiPollingIntervalMilliseconds = 20 * 1000;  // 20s
-}  // namespace
-
-// static
-WifiDataProvider* WifiDataProviderManager::DefaultFactoryFunction() {
-  return new WifiDataProviderMac();
-}
-
-WifiDataProviderMac::WifiDataProviderMac() {}
-
-WifiDataProviderMac::~WifiDataProviderMac() {}
-
-WifiDataProviderMac::WlanApiInterface* WifiDataProviderMac::NewWlanApi() {
-  WifiDataProviderMac::WlanApiInterface* core_wlan_api = NewCoreWlanApi();
-  if (core_wlan_api)
-    return core_wlan_api;
-
-  DVLOG(1) << "WifiDataProviderMac : failed to initialize any wlan api";
-  return NULL;
-}
-
-WifiPollingPolicy* WifiDataProviderMac::NewPollingPolicy() {
-  return new GenericWifiPollingPolicy<
-      kDefaultPollingInterval, kNoChangePollingInterval,
-      kTwoNoChangePollingInterval, kNoWifiPollingIntervalMilliseconds>;
-}
-
-}  // namespace device